W3C home > Mailing lists > Public > public-dap-commits@w3.org > January 2017

dap commit: Shelve Network Service Discovery API

From: Mercurial notifier <cvsmail@w3.org>
Date: Thu, 12 Jan 2017 13:23:55 +0000
To: public-dap-commits@w3.org
Message-Id: <E1cRfMB-0003G3-L5@mcbain.w3.org>
changeset:   594:ffb713303c21
tag:         tip
user:        Dominique Hazael-Massieux <dom@w3.org>
date:        Wed Jan 11 10:30:32 2017 +0100
files:       discovery-api/Overview.html discovery-api/Overview.src.html
description:
Shelve Network Service Discovery API

per https://lists.w3.org/Archives/Public/public-device-apis/2017Jan/0000.html


diff -r 794817a23d8e -r ffb713303c21 discovery-api/Overview.html
--- a/discovery-api/Overview.html	Thu Mar 17 16:00:35 2016 +0200
+++ b/discovery-api/Overview.html	Wed Jan 11 10:30:32 2017 +0100
@@ -1,3405 +1,643 @@
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+    {
+      "specStatus": "WG-NOTE",
+      "shortName": "discovery-api",
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+      "previousMaturity": "WD",
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+      "noIDLIn": true,
+      "publishDate": "2017-01-12"
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+    </p>
+    <h1 class="title p-name" id="title" property="dcterms:title">Network Service Discovery</h1>
+    <h2 id="w3c-working-group-note-12-january-2017"><abbr title="World Wide Web Consortium">W3C</abbr> Working Group Note <time property="dcterms:issued" class="dt-published" datetime="2017-01-12">12 January 2017</time></h2>
+    <dl>
+      <dt>This version:</dt>
+      <dd><a class="u-url" href="https://www.w3.org/TR/2017/NOTE-discovery-api-20170112/">https://www.w3.org/TR/2017/NOTE-discovery-api-20170112/</a></dd>
+      <dt>Latest published version:</dt>
+      <dd><a href="https://www.w3.org/TR/discovery-api/">https://www.w3.org/TR/discovery-api/</a></dd>
+      <dt>Latest editor's draft:</dt>
+      <dd><a href="http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html</a></dd>
+      <dt>Previous version:</dt>
+      <dd><a rel="dcterms:replaces" href="https://www.w3.org/TR/2014/WD-discovery-api-20140220/">https://www.w3.org/TR/2014/WD-discovery-api-20140220/</a></dd>
+      <dt>Editor:</dt>
+      <dd class="p-author h-card vcard" property="bibo:editor" resource="_:editor0"><span property="rdf:first" typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Rich Tibbett</span>, <a property="foaf:workplaceHomepage" class="p-org org h-org h-card" href="http://opera.com/">Opera Software ASA</a></span>
+        <span property="rdf:rest" resource="rdf:nil"></span>
+      </dd>
 
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+    </dl>
+    <p class="copyright">
+      <a href="https://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2017
+
+      <a href="https://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a href="https://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>,
+      <a href="https://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
+      <a href="https://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>).
+      <abbr title="World Wide Web Consortium">W3C</abbr> <a href="https://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
+      <a href="https://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and
+      <a rel="license" href="https://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.
+    </p>
+    <hr title="Separator for header">
+  </div>
+
+  <section id="abstract" class="introductory" property="dc:abstract">
+    <h2 id="h-abstract" resource="#h-abstract"><span property="xhv:role" resource="xhv:heading">Abstract</span></h2>
+    <p>
+      This specification defines a mechanism for an HTML document to discover and subsequently communicate with
+      <abbr title="Hypertext Transfer Protocol">HTTP</abbr>-based services advertised via common discovery protocols within the current network.
+    </p>
+  </section>
+
+  <section id="sotd" class="introductory">
+    <h2 id="h-sotd" resource="#h-sotd"><span property="xhv:role" resource="xhv:heading">Status of This Document</span></h2>
+    <p>
+      <em>This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current <abbr title="World Wide Web Consortium">W3C</abbr> publications and the latest revision of this technical report can be found in the <a href="https://www.w3.org/TR/"><abbr title="World Wide Web Consortium">W3C</abbr> technical reports index</a> at https://www.w3.org/TR/.</em>
+    </p>
+
+    <p>
+      <strong>Work on this document has been discontinued and it should not be referenced or used as a basis for implementation.</strong> The <a href="https://www.w3.org/TR/presentation-api/">Presentation API</a> and the <a href="https://www.w3.org/TR/remote-playback/">Remote Playback API</a> address a subset of the use cases this API attempted to address.
+    </p>
+
+    <p>
+      This document was published by the <a href="https://www.w3.org/2009/dap/">Device and Sensors Working Group</a> as a Working Group Note. If you wish to make comments regarding this document, please send them to
+      <a href="mailto:public-device-apis@w3.org">public-device-apis@w3.org</a> (<a href="mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>,
+      <a href="https://lists.w3.org/Archives/Public/public-device-apis/">archives</a>). All comments are welcome.
+    </p>
+    <p>
+      Publication as a Working Group Note does not imply endorsement by the <abbr title="World Wide Web Consortium">W3C</abbr> Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.
+    </p>
+    <p>
+      This document was produced by a group operating under the
+      <a id="sotd_patent" property="w3p:patentRules" href="https://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title="World Wide Web Consortium">W3C</abbr> Patent
+              Policy</a>.
+      <abbr title="World Wide Web Consortium">W3C</abbr> maintains a <a href="https://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">public list of any patent
+                disclosures</a> made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains
+      <a href="https://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
+              Claim(s)</a> must disclose the information in accordance with
+      <a href="https://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
+              6 of the <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+    </p>
+    <p>This document is governed by the <a id="w3c_process_revision" href="https://www.w3.org/2015/Process-20150901/">1 September 2015 <abbr title="World Wide Web Consortium">W3C</abbr> Process Document</a>.
+    </p>
+
+  </section>
+
+
+
+  <style>
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-    </style>
-    <link rel="stylesheet"
-          href="https://www.w3.org/StyleSheets/TR/W3C-ED">
-  </head>
-  <body class="h-entry"
-        style=""
-        role="document"
-        id="respecDocument">
-    <div class="head"
-         role="contentinfo"
-         id="respecHeader">
-      <p>
-        <a href="http://www.w3.org/"><img width="72"
-             height="48"
-             src="https://www.w3.org/Icons/w3c_home"
-             alt="W3C"></a>
-      </p>
-      <h1 class="title p-name"
-          id="title"
-          property="dcterms:title">
-        Network Service Discovery
-      </h1>
-      <h2 property="dcterms:issued"
-          datatype="xsd:dateTime"
-          content="2014-02-18T12:22:23.000Z"
-          id="w3c-editor-s-draft-18-february-2014">
-        <abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft <time class="dt-published"
-            datetime="2014-02-18">18 February 2014</time>
-      </h2>
-      <dl>
-        <dt>
-          This version:
-        </dt>
-        <dd>
-          <a class="u-url"
-              href=
-              "http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html</a>
-        </dd>
-        <dt>
-          Latest published version:
-        </dt>
-        <dd>
-          <a href="http://www.w3.org/TR/discovery-api/">http://www.w3.org/TR/discovery-api/</a>
-        </dd>
-        <dt>
-          Latest editor's draft:
-        </dt>
-        <dd>
-          <a href=
-          "http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html">http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html</a>
-        </dd>
-        <dt>
-          Editor:
-        </dt>
-        <dd class="p-author h-card vcard"
-            rel="bibo:editor"
-            inlist="">
-          <span typeof="foaf:Person"><span property="foaf:name"
-                class="p-name fn">Rich Tibbett</span>, <a rel="foaf:workplaceHomepage"
-             class="p-org org h-org h-card"
-             href="http://opera.com/">Opera Software ASA</a></span>
-        </dd>
-      </dl>
-      <p class="copyright">
-        <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2014 <a href=
-        "http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a href=
-        "http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>, <a href=
-        "http://www.ercim.eu/"><abbr title=
-        "European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>, <a href=
-        "http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved.
-        <abbr title="World Wide Web Consortium">W3C</abbr> <a href=
-        "http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>, <a href=
-        "http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a href=
-        "http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.
-      </p>
-      <hr>
-    </div>
-    <section id="abstract"
-             class="introductory"
-             property="dcterms:abstract"
-             datatype=""
-             typeof="bibo:Chapter"
-             resource="#ref"
-             rel="bibo:Chapter">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_abstract">
-        Abstract
-      </h2>
-      <p>
-        This specification defines a mechanism for an HTML document to discover and subsequently communicate with
-        <abbr title="Hypertext Transfer Protocol">HTTP</abbr>-based services advertised via common discovery protocols
-        within the current network.
-      </p>
-    </section>
-    <section id="sotd"
-             class="introductory"
-             typeof="bibo:Chapter"
-             resource="#ref"
-             rel="bibo:Chapter">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_sotd">
-        Status of This Document
-      </h2>
-      <p>
-        <em>This section describes the status of this document at the time of its publication. Other documents may
-        supersede this document. A list of current <abbr title="World Wide Web Consortium">W3C</abbr> publications and
-        the latest revision of this technical report can be found in the <a href="http://www.w3.org/TR/"><abbr title=
-        "World Wide Web Consortium">W3C</abbr> technical reports index</a> at http://www.w3.org/TR/.</em>
-      </p>
-      <p>
-        This document represents the early consensus of the group on the scope and features of the proposed
-        <abbr title="Application Programming Interface">API</abbr>.
-      </p>
-      <p>
-        This document was published by the <a href="http://www.w3.org/2009/dap/">Device APIs Working Group</a> as an
-        Editor's Draft. If you wish to make comments regarding this document, please send them to <a href=
-        "mailto:public-device-apis@w3.org">public-device-apis@w3.org</a> (<a href=
-        "mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>, <a href=
-        "http://lists.w3.org/Archives/Public/public-device-apis/">archives</a>). All comments are welcome.
-      </p>
-      <p>
-        Publication as an Editor's Draft does not imply endorsement by the <abbr title=
-        "World Wide Web Consortium">W3C</abbr> Membership. This is a draft document and may be updated, replaced or
-        obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in
-        progress.
-      </p>
-      <p>
-        This document was produced by a group operating under the <a id="sotd_patent"
-           about=""
-           rel="w3p:patentRules"
-           href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title=
-           "World Wide Web Consortium">W3C</abbr> Patent Policy</a>. <abbr title="World Wide Web Consortium">W3C</abbr>
-           maintains a <a href="http://www.w3.org/2004/01/pp-impl/43696/status"
-           rel="disclosure">public list of any patent disclosures</a> made in connection with the deliverables of the
-           group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge
-           of a patent which the individual believes contains <a href=
-           "http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose
-           the information in accordance with <a href=
-           "http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section 6 of the <abbr title=
-           "World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
-      </p>
-    </section>
-    <section id="toc">
-      <h2 class="introductory"
-          aria-level="1"
-          role="heading"
-          id="h2_toc">
-        Table of Contents
-      </h2>
-      <ul class="toc"
-          role="directory"
-          id="respecContents">
-        <li class="tocline">
-          <a href="#introduction"
-              class="tocxref"><span class="secno">1.</span> Introduction</a>
-        </li>
-        <li class="tocline">
-          <a href="#conformance"
-              class="tocxref"><span class="secno">2.</span> Conformance</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#dependencies"
-                  class="tocxref"><span class="secno">2.1</span> Dependencies</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#terminology"
-              class="tocxref"><span class="secno">3.</span> Terminology</a>
-        </li>
-        <li class="tocline">
-          <a href="#security-and-privacy-considerations"
-              class="tocxref"><span class="secno">4.</span> Security and privacy considerations</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#security-considerations-for-api-implementations"
-                  class="tocxref"><span class="secno">4.1</span> Security considerations for <abbr title=
-                  "Application Programming Interface">API</abbr> implementations</a>
-            </li>
-            <li class="tocline">
-              <a href="#privacy-considerations-for-api-implementations"
-                  class="tocxref"><span class="secno">4.2</span> Privacy considerations for <abbr title=
-                  "Application Programming Interface">API</abbr> implementations</a>
-            </li>
-            <li class="tocline">
-              <a href="#additional-api-implementation-considerations"
-                  class="tocxref"><span class="secno">4.3</span> Additional <abbr title=
-                  "Application Programming Interface">API</abbr> implementation considerations</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#requesting-networked-services"
-              class="tocxref"><span class="secno">5.</span> Requesting networked services</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#methods"
-                  class="tocxref"><span class="secno">5.1</span> Methods</a>
-            </li>
-            <li class="tocline">
-              <a href="#error-handling"
-                  class="tocxref"><span class="secno">5.2</span> Error Handling</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#obtaining-networked-services"
-              class="tocxref"><span class="secno">6.</span> Obtaining networked services</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#attributes"
-                  class="tocxref"><span class="secno">6.1</span> Attributes</a>
-            </li>
-            <li class="tocline">
-              <a href="#methods-1"
-                  class="tocxref"><span class="secno">6.2</span> Methods</a>
-            </li>
-            <li class="tocline">
-              <a href="#events"
-                  class="tocxref"><span class="secno">6.3</span> Events</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#communicating-with-a-networked-service"
-              class="tocxref"><span class="secno">7.</span> Communicating with a networked service</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#attributes-1"
-                  class="tocxref"><span class="secno">7.1</span> Attributes</a>
-            </li>
-            <li class="tocline">
-              <a href="#states"
-                  class="tocxref"><span class="secno">7.2</span> States</a>
-            </li>
-            <li class="tocline">
-              <a href="#events-1"
-                  class="tocxref"><span class="secno">7.3</span> Events</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#service-discovery"
-              class="tocxref"><span class="secno">8.</span> Service Discovery</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#zeroconf-mdns-dns-sd"
-                  class="tocxref"><span class="secno">8.1</span> Zeroconf (<abbr title="Multicast DNS">mDNS</abbr> +
-                  <abbr title="Domain Name System">DNS</abbr>-<abbr title="Service Discovery">SD</abbr>)</a>
-            </li>
-            <li class="tocline">
-              <a href="#simple-service-discovery-protocol-ssdp"
-                  class="tocxref"><span class="secno">8.2</span> Simple Service Discovery Protocol (<abbr title=
-                  "Simple Service Discovery Protocol">SSDP</abbr>)</a>
-            </li>
-            <li class="tocline">
-              <a href="#discovery-and-launch-protocol-dial"
-                  class="tocxref"><span class="secno">8.3</span> Discovery and Launch Protocol (<abbr title=
-                  "Discovery and Launch Protocol">DIAL</abbr>)</a>
-            </li>
-            <li class="tocline">
-              <a href="#network-topology-monitoring"
-                  class="tocxref"><span class="secno">8.4</span> Network Topology Monitoring</a>
-            </li>
-          </ul>
-        </li>
-        <li class="tocline">
-          <a href="#events-summary"
-              class="tocxref"><span class="secno">9.</span> Events Summary</a>
-        </li>
-        <li class="tocline">
-          <a href="#garbage-collection"
-              class="tocxref"><span class="secno">10.</span> Garbage collection</a>
-        </li>
-        <li class="tocline">
-          <a href="#use-cases-and-requirements"
-              class="tocxref"><span class="secno">11.</span> Use Cases and Requirements</a>
-        </li>
-        <li class="tocline">
-          <a href="#examples"
-              class="tocxref"><span class="secno">A.</span> Examples</a>
-        </li>
-        <li class="tocline">
-          <a href="#acknowledgements"
-              class="tocxref"><span class="secno">B.</span> Acknowledgements</a>
-        </li>
-        <li class="tocline">
-          <a href="#references"
-              class="tocxref"><span class="secno">C.</span> References</a>
-          <ul class="toc">
-            <li class="tocline">
-              <a href="#normative-references"
-                  class="tocxref"><span class="secno">C.1</span> Normative references</a>
-            </li>
-            <li class="tocline">
-              <a href="#informative-references"
-                  class="tocxref"><span class="secno">C.2</span> Informative references</a>
-            </li>
-          </ul>
-        </li>
-      </ul>
-    </section>
-    <section class="informative"
-             id="introduction">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_introduction">
-        <span class="secno">1.</span> Introduction
-      </h2>
-      <p>
-        <em>This section is non-normative.</em>
-      </p>
-      <p>
-        This specification defines the <a href="#navigatornetworkservice"><code>NavigatorNetworkService</code></a>
-        interface to enable Web pages to connect and communicate with Local-networked Services provided over
-        <abbr title="Hypertext Transfer Protocol">HTTP</abbr>. This enables access to services and content provided by
-        home network devices, including the discovery and playback of content available to those devices, both from
-        services such as traditional broadcast media and internet based services as well as local services. Initial
-        design goals and requirements provided by the <a href="http://www.w3.org/2011/webtv/"><abbr title=
-        "World Wide Web Consortium">W3C</abbr> Web &amp; TV interest group</a> are documented in [<cite><a class=
-        "bibref"
-           href="#bib-hnreq">hnreq</a></cite>].
-      </p>
-      <p>
-        Using this <abbr title="Application Programming Interface">API</abbr> consists of requesting a well-known
-        service type, known by developers and advertised by Local-networked Devices. User authorization, where the user
-        connects the web page to discovered services, is expected before the web page is able to interact with any
-        Local-networked Services.
-      </p>
-      <p>
-        A web page creates a request to obtain connectivity to services running in the network by specifying a
-        well-known discovery service type that it wishes to interact with.
-      </p>
-      <p>
-        The user agent, having captured all advertised services on the network from the <a href=
-        "#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a> included in this recommendation, attempts to match the
-           requested service type to a discovered service according to the processing described herein. Only
-           Local-networked Services that pass a <a href="#dfn-preliminary-cors-check"
-           class="internalDFN">preliminary CORS check</a> should be made available to web pages by a user agent. A user
-           agent may provide a way for users to white-list non-CORS enabled Local-networked Services but implementation
-           of such a feature is left to the discretion of the implementer.
-      </p>
-      <p>
-        If a service connectivity request is successful then the Web page is provided with a promise-based success
-        callback with the all necessary information to communicate with the authorized Local-networked Service. If the
-        request fails then the Web page will receive a promise-based error callback containing an error string
-        describing the cause of Local-networked Service connectivity failure.
-      </p>
-      <p>
-        Once connected to a Local-networked Service the Web page can send requests and receive responses to the
-        Local-networked Service via the messaging format and appropriate channel inferred from the service type
-        authorized via the provided <abbr title="Application Programming Interface">API</abbr>. The Web page, once
-        connected, can also receive service-pushed events, in the messaging format supported by the Local-networked
-        Device, if such event subscription functionality is provided by the connected Local-networked Service.
-      </p>
-      <p>
-        Services available within the local network can connect and disconnect at different times during the execution
-        of a web page. The user agent can inform a web page when the state of networked services matching any of the
-        requested valid service types change. Web pages can use this information to enable in-page experiences for
-        communicating the state of networked services with the ability to change the particular service or set of
-        services the page is connected to (by re-invoking the <a href=
-        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method defined herein).
-      </p>
-      <div class="example">
-        <p>
-          Example of requesting a <abbr title="Domain Name System">DNS</abbr>-<abbr title="Service Discovery">SD</abbr>
-          advertised service:
-        </p>
-        <hr>
-        <pre class="highlight prettyprint prettyprinted"
-             style="">
-<span class="kwd">function</span><span class="pln"> showServices</span><span class="pun">(</span><span class=
-"pln"> services </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-  </span><span class="com">// Show a list of all the services provided to the web page</span><span class="pln">
-  </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">var</span><span class=
-"pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class=
-"pun">,</span><span class="pln"> l </span><span class="pun">=</span><span class="pln"> services</span><span class=
-"pun">.</span><span class="pln">length</span><span class="pun">;</span><span class="pln"> i </span><span class=
-"pun">&lt;</span><span class="pln"> l</span><span class="pun">;</span><span class="pln"> i</span><span class=
-"pun">++)</span><span class="pln"> console</span><span class="pun">.</span><span class="pln">log</span><span class=
-"pun">(</span><span class="pln"> services</span><span class="pun">[</span><span class="pln">i</span><span class=
-"pun">].</span><span class="pln">name </span><span class="pun">);</span><span class="pln">
-</span><span class="pun">}</span><span class="pln">
-
-navigator</span><span class="pun">.</span><span class="pln">getNetworkServices</span><span class=
-"pun">(</span><span class="str">'zeroconf:_boxee-jsonrpc._tcp'</span><span class="pun">).</span><span class=
-"kwd">then</span><span class="pun">(</span><span class="pln">showServices</span><span class="pun">);</span>
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          Example of requesting a UPnP advertised service, also handling error conditions:
-        </p>
-        <hr>
-        <pre class="highlight prettyprint prettyprinted"
-             style="">
-<span class="kwd">function</span><span class="pln"> showServices</span><span class="pun">(</span><span class=
-"pln"> services </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-  </span><span class="com">// Show a list of all the services provided to the web page</span><span class="pln">
-  </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">var</span><span class=
-"pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class=
-"pun">,</span><span class="pln"> l </span><span class="pun">=</span><span class="pln"> services</span><span class=
-"pun">.</span><span class="pln">length</span><span class="pun">;</span><span class="pln"> i </span><span class=
-"pun">&lt;</span><span class="pln"> l</span><span class="pun">;</span><span class="pln"> i</span><span class=
-"pun">++)</span><span class="pln"> console</span><span class="pun">.</span><span class="pln">log</span><span class=
-"pun">(</span><span class="pln"> services</span><span class="pun">[</span><span class="pln">i</span><span class=
-"pun">].</span><span class="pln">name </span><span class="pun">);</span><span class="pln">
-</span><span class="pun">}</span><span class="pln">
-
-</span><span class="kwd">function</span><span class="pln"> error</span><span class="pun">(</span><span class=
-"pln"> e </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-  console</span><span class="pun">.</span><span class="pln">log</span><span class="pun">(</span><span class=
-"pln"> </span><span class="str">"Error occurred: "</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln"> e</span><span class="pun">.</span><span class="pln">name </span><span class=
-"pun">);</span><span class="pln">
-</span><span class="pun">}</span><span class="pln">
-
-navigator</span><span class="pun">.</span><span class="pln">getNetworkServices</span><span class=
-"pun">(</span><span class="str">'upnp:urn:schemas-upnp-org:service:ContentDirectory:1'</span><span class=
-"pun">).</span><span class="kwd">then</span><span class="pun">(</span><span class="pln">showServices</span><span class=
-"pun">,</span><span class="pln"> error</span><span class="pun">);</span>
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          Example of requesting either a <abbr title="Domain Name System">DNS</abbr>-<abbr title=
-          "Service Discovery">SD</abbr> or UPnP advertised service:
-        </p>
-        <hr>
-        <pre class="highlight prettyprint prettyprinted"
-             style="">
-<span class="kwd">function</span><span class="pln"> showServices</span><span class="pun">(</span><span class=
-"pln"> services </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-  </span><span class=
-"com">// Show a list of all the services provided to the web page (+ service type)</span><span class="pln">
-  </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">var</span><span class=
-"pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class=
-"pun">,</span><span class="pln"> l </span><span class="pun">=</span><span class="pln"> services</span><span class=
-"pun">.</span><span class="pln">length</span><span class="pun">;</span><span class="pln"> i </span><span class=
-"pun">&lt;</span><span class="pln"> l</span><span class="pun">;</span><span class="pln"> i</span><span class=
-"pun">++)</span><span class="pln">
-     console</span><span class="pun">.</span><span class="pln">log</span><span class="pun">(</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="pln">i</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class="str">'('</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln"> services</span><span class="pun">[</span><span class=
-"pln">i</span><span class="pun">].</span><span class="pln">type </span><span class="pun">+</span><span class=
-"pln"> </span><span class="str">')'</span><span class="pln"> </span><span class="pun">);</span><span class="pln">
-</span><span class="pun">}</span><span class="pln">
-
-navigator</span><span class="pun">.</span><span class="pln">getNetworkServices</span><span class=
-"pun">([</span><span class="pln">
-  </span><span class="str">'zeroconf:_boxee-jsonrpc._tcp'</span><span class="pun">,</span><span class="pln">
-  </span><span class="str">'upnp:urn:schemas-upnp-org:service:ContentDirectory:1'</span><span class="pln">
-</span><span class="pun">]).</span><span class="kwd">then</span><span class="pun">(</span><span class=
-"pln">showServices</span><span class="pun">);</span>
-</pre>
-      </div>
-      <p>
-        For more detailed examples, including examples of communicating with obtained networked services, see the
-        <a href="#examples">Examples</a> section.
-      </p>
-    </section>
-    <section id="conformance"
-             typeof="bibo:Chapter"
-             resource="#ref"
-             rel="bibo:Chapter">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_conformance">
-        <span class="secno">2.</span> Conformance
-      </h2>
-      <p>
-        As well as sections marked as non-normative, all authoring guidelines, diagrams, examples, and notes in this
-        specification are non-normative. Everything else in this specification is normative.
-      </p>
-      <p>
-        The key words <em class="rfc2119"
-           title="MUST">MUST</em>, <em class="rfc2119"
-           title="MUST NOT">MUST NOT</em>, <em class="rfc2119"
-           title="REQUIRED">REQUIRED</em>, <em class="rfc2119"
-           title="SHOULD">SHOULD</em>, <em class="rfc2119"
-           title="SHOULD NOT">SHOULD NOT</em>, <em class="rfc2119"
-           title="RECOMMENDED">RECOMMENDED</em>, <em class="rfc2119"
-           title="MAY">MAY</em>, and <em class="rfc2119"
-           title="OPTIONAL">OPTIONAL</em> in this specification are to be interpreted as described in [<cite><a class=
-           "bibref"
-           href="#bib-RFC2119">RFC2119</a></cite>].
-      </p>
-      <p>
-        Requirements phrased in the imperative as part of algorithms (such as "strip any leading space characters" or
-        "return false and abort these steps") are to be interpreted with the meaning of the key word ("must", "should",
-        "may", etc) used in introducing the algorithm.
-      </p>
-      <p>
-        Some conformance requirements are phrased as requirements on attributes, methods or objects. Such requirements
-        are to be interpreted as requirements on user agents.
-      </p>
-      <p>
-        Conformance requirements phrased as algorithms or specific steps <em class="rfc2119"
-           title="MAY">MAY</em> be implemented in any manner, so long as the end result is equivalent. (In particular,
-           the algorithms defined in this specification are intended to be easy to follow, and not intended to be
-           performant.)
-      </p>
-      <p>
-        The only conformance class defined by this specification is a <dfn id="dfn-user-agent">user agent</dfn>.
-      </p>
-      <p>
-        User agents <em class="rfc2119"
-           title="MAY">MAY</em> impose implementation-specific limits on otherwise unconstrained inputs, e.g. to
-           prevent denial of service attacks, to guard against running out of memory, or to work around
-           platform-specific limitations.
-      </p>
-      <p>
-        When support for a feature is disabled (e.g. as an emergency measure to mitigate a security problem, or to aid
-        in development, or for performance reasons), user agents <em class="rfc2119"
-           title="MUST">MUST</em> act as if they had no support for the feature whatsoever, and as if the feature was
-           not mentioned in this specification. For example, if a particular feature is accessed via an attribute in a
-           Web IDL interface, the attribute itself would be omitted from the objects that implement that interface -
-           leaving the attribute on the object but making it return null or throw an exception is insufficient.
-      </p>
-      <section id="dependencies">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_dependencies">
-          <span class="secno">2.1</span> Dependencies
-        </h3>This specification relies on several other underlying specifications.
-        <dl>
-          <dt>
-            HTML
-          </dt>
-          <dd>
-            Many fundamental concepts from HTML are used by this specification. [<cite><a class="bibref"
-               href="#bib-HTML5">HTML5</a></cite>]
-          </dd>
-          <dt>
-            WebIDL
-          </dt>
-          <dd>
-            The IDL blocks in this specification use the semantics of the WebIDL specification. [<cite><a class=
-            "bibref"
-               href="#bib-WEBIDL">WEBIDL</a></cite>]
-          </dd>
-        </dl>
-      </section>
-    </section>
-    <section id="terminology">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_terminology">
-        <span class="secno">3.</span> Terminology
-      </h2>
-      <p>
-        The construction "a <code>Foo</code> object", where <code>Foo</code> is actually an interface, is sometimes
-        used instead of the more accurate "an object implementing the interface <code>Foo</code>".
-      </p>
-      <p>
-        The term DOM is used to refer to the <abbr title="Application Programming Interface">API</abbr> set made
-        available to scripts in Web applications, and does not necessarily imply the existence of an actual
-        <code>Document</code> object or of any other <code>Node</code> objects as defined in the DOM Core
-        specifications. [<cite><a class="bibref"
-           href="#bib-DOM4">DOM4</a></cite>]
-      </p>
-      <p>
-        An IDL attribute is said to be <em>getting</em> when its value is being retrieved (e.g. by author script), and
-        is said to be <em>setting</em> when a new value is assigned to it.
-      </p>
-      <p>
-        A <dfn id="dfn-valid-service-type">valid service type</dfn> is any of the following:
-      </p>
-      <ul>
-        <li>a string that begins with <code>upnp:</code> or <code>zeroconf:</code> followed by one or more characters
-        in the ranges U+0021, U+0023 to U+0027, U+002A to U+002B, U+002D to U+002E, U+0030 to U+0039, U+0041 to U+005A,
-        U+005E to U+007E.
-        </li>
-        <li>a string that begins with <code>dial:</code> followed by an integer version.
-        </li>
-      </ul>
-      <p>
-        A <a href="#dfn-valid-service-type"
-           class="internalDFN">valid service type</a> provided in the <code>type</code> attribute of the <a href=
-           "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method will be matched against the
-           services currently contained in the <a href="#dfn-list-of-available-service-records"
-           class="internalDFN">list of available service records</a> according to the algorithms defined in this
-           specification.
-      </p>
-      <p>
-        A <dfn id="dfn-user-agent-generated-callback-url">user-agent generated callback url</dfn> is a Local-network
-        accessible URL endpoint that a <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> generates and maintains for receiving <abbr title=
-           "Hypertext Transfer Protocol">HTTP</abbr> NOTIFY requests from UPnP Event sources. It is only required when
-           the user agent implements UPnP Service Discovery as defined in this specification.
-      </p>
-      <p>
-        In this specification we use the following terms to describe the processes required for Local-networked
-        Services management:
-      </p>
-      <ul>
-        <li>A <dfn id="dfn-new-service">new service</dfn> is a Local-networked Service that has not previously been
-        discovered or registered in the <a href="#dfn-list-of-available-service-records"
-              class="internalDFN">list of available service records</a>.
-        </li>
-        <li>An <dfn id="dfn-existing-service">existing service</dfn> is a Local-networked Service that has previously
-        been discovered and is registered in the <a href="#dfn-list-of-available-service-records"
-              class="internalDFN">list of available service records</a>.
-        </li>
-        <li>A <dfn id="dfn-current-service">current service</dfn> is a Local-networked Service, represented by a
-        <a href="#networkservice"><code>NetworkService</code></a> object, that is currently being shared with a web
-        page via a <a href="#networkservices"><code>NetworkServices</code></a> object registered in the <a href=
-        "#dfn-list-of-active-service-managers"
-              class="internalDFN">list of active service managers</a>.
-        </li>
-      </ul>
-      <p>
-        A <dfn id="dfn-network-services-whitelist">network services whitelist</dfn> is a list of zero or more <a href=
-        "#dfn-valid-service-type"
-           class="internalDFN">valid service type</a> tokens that, when matched to a service type discovered in the
-           local network, enables that service to be shared with a web page even if that Local-networked Service does
-           not itself allow Cross-Origin Resource Sharing [<cite><a class="bibref"
-           href="#bib-CORS">CORS</a></cite>]. A <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> <em class="rfc2119"
-           title="MUST">MUST</em> simulate CORS support for all service interaction in this case. Implementation of
-           this feature is at implementer's discretion. When a <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> does not implement a <a href="#dfn-network-services-whitelist"
-           class="internalDFN">network services whitelist</a> then it is to treat this as always being an empty list.
-      </p>
-    </section>
-    <section id="security-and-privacy-considerations">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_security-and-privacy-considerations">
-        <span class="secno">4.</span> Security and privacy considerations
-      </h2>
-      <p>
-        The <abbr title="Application Programming Interface">API</abbr> defined in this specification can be used to
-        find and connect to devices and services within a user's current network. This discloses information related to
-        a user's network: devices available on their network and the publicly-accessible services ("networked
-        services") currently running and available on those devices. The distribution of this information could
-        potentially compromise the user's privacy. A conforming implementation of this specification <em class=
-        "rfc2119"
-           title="MUST">MUST</em> provide a mechanism that protects the user's privacy. This mechanism <em class=
-           "rfc2119"
-           title="MUST">MUST</em> ensure that no networked service information is retrievable without the user's
-           express permission.
-      </p>
-      <section id="security-considerations-for-api-implementations">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_security-considerations-for-api-implementations">
-          <span class="secno">4.1</span> Security considerations for <abbr title=
-          "Application Programming Interface">API</abbr> implementations
-        </h3>
-        <p>
-          A <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> <em class="rfc2119"
-             title="SHOULD">SHOULD</em> only allow web pages to connect with Local-networked Services that have passed
-             a <a href="#dfn-preliminary-cors-check"
-             class="internalDFN">preliminary CORS check</a> indicating they support Cross-Origin Resource Sharing
-             [<cite><a class="bibref"
-             href="#bib-CORS">CORS</a></cite>]. In this way, a <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> <em class="rfc2119"
-             title="SHOULD NOT">SHOULD NOT</em> allow web pages to access other arbitrary networked services on the
-             current local network.
-        </p>
-        <p>
-          A <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> <em class="rfc2119"
-             title="MAY">MAY</em> provide a way for users to enable access to non-CORS enabled Local-networked Services
-             from web pages (i.e. operate a <a href="#dfn-network-services-whitelist"
-             class="internalDFN">network services whitelist</a>). Implementation of such a <a href=
-             "#dfn-network-services-whitelist"
-             class="internalDFN">network services whitelist</a>, if any, is left to an implementer's discretion. Such a
-             whitelist may be configurable by each user at runtime or may be managed by the implementation itself on
-             behalf of its users. In the case that a <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> provides a <a href="#dfn-network-services-whitelist"
-             class="internalDFN">network services whitelist</a>, it <em class="rfc2119"
-             title="MUST">MUST</em> act as if all URLs for the Local-networked Service corresponding to any previously
-             whitelisted service type had Cross-Origin Resource Sharing [<cite><a class="bibref"
-             href="#bib-CORS">CORS</a></cite>] enabled indefinitely.
-        </p>
-      </section>
-      <section id="privacy-considerations-for-api-implementations">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_privacy-considerations-for-api-implementations">
-          <span class="secno">4.2</span> Privacy considerations for <abbr title=
-          "Application Programming Interface">API</abbr> implementations
-        </h3>
-        <p>
-          A <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> <em class="rfc2119"
-             title="MUST NOT">MUST NOT</em> provide networked service information to web sites without the express
-             permission of the user. A user agent <em class="rfc2119"
-             title="MUST">MUST</em> acquire permission through a user interface, unless they have prearranged trust
-             relationships with users, as described below. The user interface <em class="rfc2119"
-             title="MUST">MUST</em> include the document base URL. Those permissions that are acquired through the user
-             interface and that are preserved beyond the current browsing session (i.e. beyond the time when the
-             browsing context is navigated to another URL) <em class="rfc2119"
-             title="MUST">MUST</em> be revocable and a user agent <em class="rfc2119"
-             title="MUST">MUST</em> respect revoked permissions.
-        </p>
-        <p>
-          Obtaining the user's express permission to access one <abbr title=
-          "Application Programming Interface">API</abbr> method does not imply the user has granted permission for the
-          same web site to access any other methods that may be provided by this <abbr title=
-          "Application Programming Interface">API</abbr>, or to access the same method with a different set of
-          arguments, as part of the same permission context. If a user has expressed permission for an implementation
-          to, e.g. find a set of existing networked services, the implementation <em class="rfc2119"
-             title="MUST">MUST</em> seek the user's express permission if and when any subsequent functions are called
-             on this <abbr title="Application Programming Interface">API</abbr>.
-        </p>
-        <p>
-          A user agent <em class="rfc2119"
-             title="MAY">MAY</em> have prearranged trust relationships that do not require such user interfaces. For
-             example, while a web browser will present a user interface when a web site performs a networked service
-             lookup, a different runtime may have a prearranged, delegated security relationship with the user and, as
-             such, a suitable alternative security and privacy mechanism with which to authorise the retrieval of
-             networked service information.
-        </p>
-      </section>
-      <section class="informative"
-               id="additional-api-implementation-considerations">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_additional-api-implementation-considerations">
-          <span class="secno">4.3</span> Additional <abbr title="Application Programming Interface">API</abbr>
-          implementation considerations
-        </h3>
-        <p>
-          <em>This section is non-normative.</em>
-        </p>
-        <p>
-          Further to the requirements listed in the previous section, implementers of the Network Service Discovery
-          <abbr title="Application Programming Interface">API</abbr> are also advised to consider the following aspects
-          that can negatively affect the privacy of their users: in certain cases, users can inadvertently grant
-          permission to the user agent to disclose networked services to Web sites. In other cases, the content hosted
-          at a certain URL changes in such a way that previously granted networked service permissions no longer apply
-          as far as the user is concerned. Or the users might simply change their minds.
-        </p>
-        <p>
-          Predicting or preventing these situations is inherently difficult. Mitigation and in-depth defensive measures
-          are an implementation responsibility and not prescribed by this specification. However, in designing these
-          measures, implementers are advised to enable user awareness of networked service sharing, and to provide easy
-          access to interfaces that enable revocation of permissions that web applications have for accessing networked
-          services via this <abbr title="Application Programming Interface">API</abbr>.
-        </p>
-      </section>
-    </section>
-    <section id="requesting-networked-services">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_requesting-networked-services">
-        <span class="secno">5.</span> Requesting networked services
-      </h2>
-      <pre class="widl">
-[Supplemental, NoInterfaceObject]
-interface <dfn id="navigatornetworkservice">NavigatorNetworkService</dfn> {
-  <a class="externalDFN"
-     href="http://dom.spec.whatwg.org/#promise">Promise</a> <a href=
-     "#dom-navigator-getnetworkservices">getNetworkServices</a>( in any type );
-};
-
-<a class="externalDFN"
-     href=
-     "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">Navigator</a> implements <a href=
-     "#navigatornetworkservice">NavigatorNetworkService</a>;
-</pre>
-      <section id="methods">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_methods">
-          <span class="secno">5.1</span> Methods
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">promise</var> = <var title="">window</var> . <code title="dom-navigator"><a href=
-            "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">navigator</a></code> .
-            <code title="dom-navigator-getNetworkServices"><a href=
-            "#dom-navigator-getnetworkservices">getNetworkServices</a></code> ( <var title="">type</var> )
-          </dt>
-          <dd>
-            <p>
-              Immediately returns a new <a href="http://dom.spec.whatwg.org/#promise"
-                 class="externalDFN">Promise</a> object and then the user is prompted to select discovered network
-                 services that have advertised support for the requested service type(s).
-            </p>
-            <p>
-              The <var title="">type</var> argument contains one or more <a href="#dfn-valid-service-type"
-                 class="internalDFN">valid service type</a> tokens that the web page would like to interact with.
-            </p>
-            <p>
-              If the user accepts, the <var title="">promise</var> object is <a class="externalDFN"
-                 href="http://dom.spec.whatwg.org/#concept-resolver-resolve">resolved</a>, with a <a href=
-                 "#networkservices"><code>NetworkServices</code></a> object as its argument.
-            </p>
-            <p>
-              If the user declines, or an error occurs, the <var title="">promise</var> object is <a class=
-              "externalDFN"
-                 href="http://dom.spec.whatwg.org/#concept-resolver-reject">rejected</a>.
-            </p>
-          </dd>
-        </dl>
-        <div>
-          <p>
-            When the <dfn id="dom-navigator-getnetworkservices"
-               title="dom-navigator-getnetworkservices"><code>getNetworkServices(type)</code></dfn> method is called,
-               the <a href="#dfn-user-agent"
-               class="internalDFN">user agent</a> <em class="rfc2119"
-               title="MUST">MUST</em> run the following steps:
-          </p>
-          <ol class="rule">
-            <li>Let <var>Network Service Promise</var> be a new <a href="http://dom.spec.whatwg.org/#promise"
-                  class="externalDFN"><code>Promise</code></a> object.
-            </li>
-            <li>Let <var>Network Service Promise's Resolver</var> be the default <a href=
-            "http://dom.spec.whatwg.org/#concept-resolver"
-                  class="externalDFN">resolver</a> of <var>Network Service Promise</var>.
-            </li>
-            <li>Return <var>Network Service Promise</var>, and run the remaining steps asynchronously.
-            </li>
-            <li>Let <var>requested control types</var> be initially set to an empty array.
-            </li>
-            <li>If <var>type</var> is an array consisting of one or more <a href="#dfn-valid-service-type"
-                  class="internalDFN">valid service type</a> tokens, then let <var>requested control types</var> be the
-                  value of <var>type</var>, removing any non-<a href="#dfn-valid-service-type"
-                  class="internalDFN">valid service type</a> tokens from the resulting array.
-            </li>
-            <li>If <var>type</var> is a string consisting of one <a href="#dfn-valid-service-type"
-                  class="internalDFN">valid service type</a> token, then let <var>requested control types</var> be an
-                  array containing one item with a value of <var>type</var>.
-            </li>
-            <li>If <var>requested control types</var> is an array that contains at least one or more <a title=
-            "valid service type"
-                  href="#dfn-valid-service-type"
-                  class="internalDFN">valid service type</a> tokens then continue to the step labeled <em>process</em>
-                  below. Otherwise, reject <var>Network Service Promise</var> by running the <a href=
-                  "http://dom.spec.whatwg.org/#concept-resolver-reject"
-                  class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                  class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the string
-                  value "UnknownTypePrefixError" (<a href=
-                  "#dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a>) and whose
-                  <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                  error, abort any remaining steps and return.
-            </li>
-            <li>
-              <em>Process</em>: Let <var>services found</var> be an empty array.
-            </li>
-            <li>For each <var>available service</var> in the <a href="#dfn-list-of-available-service-records"
-                  class="internalDFN">list of available service records</a> run the following steps:
-              <ol class="rule">
-                <li>For each <var>requested control type</var> in <var>requested control types</var>: If <var>available
-                service</var>'s <code>type</code> attribute equals the <var>requested control type</var> then let <var>
-                  matched service</var> equal the value of <var>available service</var>. Otherwise, abort the remaining
-                  sub-steps and continue above at the next <var>available service</var>.
-                </li>
-                <li>If <var>matched service</var> is not empty then run the following steps:
-                  <ol class="rule">
-                    <li>Let <var>CORS check result</var> be the result of running the <a href=
-                    "#dfn-preliminary-cors-check"
-                          class="internalDFN">preliminary CORS check</a> algorithm, passing in <var>matched
-                          services</var>'s <code>url</code> attribute as the <var>control endpoint URL</var> argument
-                          and the <a href=
-                          "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
-                          class="externalDFN">entry script</a>'s <a href=
-                          "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
-                          class="externalDFN">origin</a> as the <var>request origin</var> argument.
-                    </li>
-                    <li>If <var>CORS check result</var> is not <code>pass</code> and <var>matched service</var>'s
-                    <code>type</code> attribute is also not present in the <a href="#dfn-network-services-whitelist"
-                          class="internalDFN">network services whitelist</a> then abort the remaining sub-steps and
-                          continue above at the next <var>available service</var>.
-                    </li>
-                    <li>Let <var>new service object</var> be a new <a href=
-                    "#networkservice"><code>NetworkService</code></a> object, mapping the parameters of <var>matched
-                    service</var> to this new object where possible.
-                    </li>
-                    <li>Append <var>new service object</var> to the <var>services found</var> array.
-                    </li>
-                  </ol>
-                </li>
-              </ol>
-            </li>
-            <li>Optionally, e.g. based on a previously-established user preference, for security reasons, or due to
-            platform limitations, the <a href="#dfn-user-agent"
-                  class="internalDFN">user agent</a> <em class="rfc2119"
-                  title="MAY">MAY</em> reject <var>Network Service Promise</var> by running the <a href=
-                  "http://dom.spec.whatwg.org/#concept-resolver-reject"
-                  class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                  class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the string
-                  value "PermissionDeniedError" (<a href=
-                  "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) and whose
-                  <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                  error, abort any remaining steps and return.
-            </li>
-            <li>The user agent <em class="rfc2119"
-                  title="MUST NOT">MUST NOT</em> provide the entry script's origin with a <a href=
-                  "#networkservices"><code>NetworkServices</code></a> object without prior permission given by the
-                  user.
-              <p>
-                If <var>services found</var> is not an empty array then the <a href="#dfn-user-agent"
-                   class="internalDFN">user agent</a> <em class="rfc2119"
-                   title="MAY">MAY</em> choose to prompt the user in a user-agent-specific manner for permission to
-                   provide the <a href=
-                   "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
-                   class="externalDFN">entry script</a>'s <a href=
-                   "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
-                   class="externalDFN">origin</a> with a <a href="#networkservices"><code>NetworkServices</code></a>
-                   object representing the <a href="#dfn-user-authorized"
-                   class="internalDFN">user-authorized</a> subset of <var>services found</var>.
-              </p>
-              <p>
-                Alternatively, the user agent <em class="rfc2119"
-                   title="MAY">MAY</em> wish to skip this user opt-in step and choose to fulfill <var>Network Service
-                   Promise</var> immediately based on a previously-established user preference, for security reasons,
-                   or due to platform limitations. In such an implementation, if <var>Network Service Promise</var> is
-                   to be fulfilled as a result of a previously-established user preference then the <a href=
-                   "#dfn-user-agent"
-                   class="internalDFN">user agent</a> <em class="rfc2119"
-                   title="MUST">MUST</em> continue at the next step of this algorithm.
-              </p>
-              <p>
-                If permission has been granted by the user to access one or more networked services then the <a href=
-                "#dfn-user-agent"
-                   class="internalDFN">user agent</a> <em class="rfc2119"
-                   title="SHOULD">SHOULD</em> include an "ongoing local-network communication" indicator.
-              </p>
-              <p>
-                If permission has been denied by the user, <a href="#dfn-user-agent"
-                   class="internalDFN">user agent</a> or platform, then the <a href="#dfn-user-agent"
-                   class="internalDFN">user agent</a> <em class="rfc2119"
-                   title="MUST">MUST</em> reject <var>Network Service Promise</var> by running the <a href=
-                   "http://dom.spec.whatwg.org/#concept-resolver-reject"
-                   class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                   Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                   class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the
-                   string value "PermissionDeniedError" (<a href=
-                   "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) and whose
-                   <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                   error, abort any remaining steps and return.
-              </p>
-              <p>
-                If the user never responds or no previously-established user preference has been met, this algorithm
-                stalls on this step.
-              </p>
-            </li>
-            <li>Let <var>services</var> be an empty array.
-            </li>
-            <li>If <var>services found</var> is not an empty array then set <var>services</var> to be an array of one
-            or more <a href="#networkservice"><code>NetworkService</code></a> objects for which the user granted
-            permission above - known as the current objects <dfn id="dfn-user-authorized">user-authorized</dfn>
-            services.
-            </li>
-            <li>For each Object <var>service</var> in <var>services</var>, if any, run the following sub-steps:
-              <ol class="rule">
-                <li>If <var>service</var>'s <code>type</code> parameter begins with the DOMString "<code>upnp:</code>"
-                and the <var>service</var>'s <code>eventsUrl</code> parameter is not empty then <a href=
-                "#dfn-setup-a-upnp-events-subscription"
-                      class="internalDFN">setup a UPnP Events Subscription</a> for <var>service</var>.
-                </li>
-              </ol>
-            </li>
-            <li>Let <var>services manager</var> be a new <a href="#networkservices"><code>NetworkServices</code></a>
-            object.
-            </li>
-            <li>Store <var>requested control types</var> against <var>services manager</var> as an internal variable.
-            </li>
-            <li>Set <var>services manager</var>'s <a href=
-            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute to the number of
-            items currently found in the <a href="#dfn-list-of-available-service-records"
-                  class="internalDFN">list of available service records</a> whose <code>type</code> property matches
-                  any of the tokens requested in <var>requested control types</var>.
-            </li>
-            <li>Add <var>services</var>, if any, to the <var>services manager</var> object as its collection of
-              <a href="#dfn-indexed-properties"
-                  class="internalDFN">indexed properties</a>. If <var>services</var> is an empty array then the
-                  <var>services manager</var> does not have any <var>indexed properties</var>.
-            </li>
-            <li>Set <var>services manager</var>'s <a href="#dom-networkservices-length"><code>length</code></a>
-            attribute to the number of items in <var>services</var>.
-            </li>
-            <li>Add <var>services manager</var> to the <a href="#dfn-list-of-active-service-managers"
-                  class="internalDFN">list of active service managers</a>.
-            </li>
-            <li>The <a href="#dfn-user-agent"
-                  class="internalDFN">user agent</a> <em class="rfc2119"
-                  title="MUST">MUST</em> fulfill <var>Network Service Promise</var> by running the <a href=
-                  "http://dom.spec.whatwg.org/#concept-resolver-fulfill"
-                  class="externalDFN">resolver fulfill algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in <var>services manager</var> as its argument.
-            </li>
-          </ol>
-          <p>
-            The <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#task-source"
-               class="externalDFN">task source</a> for these <a href=
-               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#concept-task"
-               class="externalDFN">tasks</a> is the <a href=
-               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#user-interaction-task-source"
-               class="externalDFN">user interaction task source</a>.
-          </p>
-          <p>
-            The <dfn id="dfn-preliminary-cors-check">preliminary CORS check</dfn> algorithm determines whether a
-            Local-networked Service supports Cross-Origin Resource Sharing [<cite><a class="bibref"
-               href="#bib-CORS">CORS</a></cite>] as part of a call to the <a href=
-               "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method, prior to that service
-               being proposed for sharing to users and prior to active sharing with web pages. This algorithm takes two
-               arguments, <var>control endpoint URL</var> and <var>request origin</var>, and consists of running the
-               following steps:
-          </p>
-          <ol class="rule">
-            <li>Let <var>CORS available check</var> be the result of applying the <a href=
-            "http://www.w3.org/TR/cors/#make-a-request-steps"
-                  class="externalDFN">make a request steps</a> [<cite><a class="bibref"
-                 href="#bib-CORS">CORS</a></cite>], setting the <a href="http://www.w3.org/TR/cors/#request-method"
-                  class="externalDFN">request method</a> to <code>OPTIONS</code>, the <a href=
-                  "http://www.w3.org/TR/cors/#request-url"
-                  class="externalDFN">request URL</a> to <var>control endpoint URL</var>, the <a href=
-                  "http://www.w3.org/TR/cors/#source-origin"
-                  class="externalDFN">source origin</a> to <var>request origin</var>, setting the <a href=
-                  "http://www.w3.org/TR/cors/#omit-credentials-flag"
-                  class="externalDFN">omit credentials flag</a> to <code>true</code> and including an <a href=
-                  "http://www.w3.org/TR/cors/#http-access-control-request-method"
-                  class="externalDFN"><code>Access-Control-Request-Method</code></a> header with a value of
-                  <code>GET</code>.
-            </li>
-            <li>If <var>CORS available check</var> is cancelled by the user, or it results in a network error, or its
-            response does not have an <abbr title="Hypertext Transfer Protocol">HTTP</abbr> status code of
-            <code>200</code> then abort any remaining steps and return <code>fail</code>.
-            </li>
-            <li>Return the result of running the <a href="http://www.w3.org/TR/cors/#resource-sharing-check"
-                  class="externalDFN">resource sharing check</a> [<cite><a class="bibref"
-                 href="#bib-CORS">CORS</a></cite>] against the successful <abbr title=
-                 "Hypertext Transfer Protocol">HTTP</abbr> response of the <var>CORS available check</var>.
-              <div class="note">
-                <div class="note-title"
-                     aria-level="3"
-                     role="heading"
-                     id="h_note_1">
-                  <span>Note</span>
-                </div>
-                <p class="">
-                  This returned result will always be either <code>pass</code> or <code>fail</code>.
-                </p>
-              </div>
-            </li>
-          </ol>
-          <p>
-            There is no implied persistence to networked service sharing provided to a web page. It <em class="rfc2119"
-               title="MUST NOT">MUST NOT</em> be possible to access a networked service previously granted to a web
-               page without user authorization in all of the following cases:
-          </p>
-          <ul>
-            <li>If the current script is reloaded at any point in the same or different window.
-            </li>
-            <li>if the current script reinvokes the <a href=
-            "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method at any point in its
-            execution.
-            </li>
-            <li>If the user navigates forward or back in their history to reload the current page.
-            </li>
-            <li>If a script is running in a different origin.
-            </li>
-          </ul>
-        </div>
-      </section>
-      <section id="error-handling">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_error-handling">
-          <span class="secno">5.2</span> Error Handling
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">error</var> . <code title="dom-NavigatorNetworkServiceError-name"><a href=
-            "#dom-domerror-extensions-name">name</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current error's error name. At the current time, this will be "PermissionDeniedError" or
-              "UnknownTypePrefixError", for which the corresponding error constants <a href=
-              "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a> and <a href=
-              "#dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a> are defined.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-domerror-extensions-name"
-             title="dom-domerror-extensions-name"><code>name</code></dfn> attribute of a <a href=
-             "http://dom.spec.whatwg.org/#domerror"
-             class="externalDFN"><code>DOMError</code></a> object returned from this <abbr title=
-             "Application Programming Interface">API</abbr> <em class="ct"><em class="rfc2119"
-              title="MUST">MUST</em></em> return the name for the error, which will be one of the following:
-        </p>
-        <dl>
-          <dt>
-            <dfn id="dom-domerror-extensions-permission_denied"
-                title="dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></dfn> (DOMString
-                value "PermissionDeniedError")
-          </dt>
-          <dd>
-            The user or user agent denied the page permission to access any services.
-          </dd>
-          <dt>
-            <dfn id="dom-domerror-extensions-unknown_type_prefix"
-                title="dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></dfn>
-                (DOMString value "UnknownTypePrefixError")
-          </dt>
-          <dd>
-            No <a href="#dfn-valid-service-type"
-                class="internalDFN">valid service type</a> tokens were provided in the method invocation.
-          </dd>
-        </dl>
-      </section>
-    </section>
-    <section id="obtaining-networked-services">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_obtaining-networked-services">
-        <span class="secno">6.</span> Obtaining networked services
-      </h2>
-      <p>
-        The <a href="#networkservices"><code>NetworkServices</code></a> interface represents a collection of zero or
-        more <a href="#dfn-indexed-properties"
-           class="internalDFN">indexed properties</a> that are each a <a href="#dfn-user-authorized"
-           class="internalDFN">user-authorized</a> <a href="#networkservice"><code>NetworkService</code></a> object.
-      </p>
-      <p>
-        A <a href="#networkservices"><code>NetworkServices</code></a> object is the <a href=
-        "http://dom.spec.whatwg.org/#concept-promise-result"
-           class="externalDFN">promise result</a> from a call to <a href=
-           "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a>.
-      </p>
-      <pre class="widl">
-[NoInterfaceObject]
-interface <dfn id="networkservices">NetworkServices</dfn> {
-  readonly attribute unsigned long    <a href="#dom-networkservices-length">length</a>;
-  getter <a href="#networkservice">NetworkService</a> (unsigned long index);
-  <a href="#networkservice">NetworkService</a>? <a href=
-"#dom-networkservices-getservicebyid">getServiceById</a>(DOMString id);
-
-  readonly attribute unsigned long    <a href="#dom-networkservices-servicesavailable">servicesAvailable</a>;
-
-  // event handler attributes
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onservicefound">onservicefound</a>;
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onservicelost">onservicelost</a>;
-
-};
-
-<a href="#networkservices">NetworkServices</a> implements <a href=
-"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
-     class="externalDFN">EventTarget</a>;
-</pre>
-      <section id="attributes">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_attributes">
-          <span class="secno">6.1</span> Attributes
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <code title="dom-networkservices-length"><a href="#dom-networkservices-length">length</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current number of <a href="#dfn-indexed-properties"
-                 class="internalDFN">indexed properties</a> in the current object's collection.
-            </p>
-          </dd>
-          <dt>
-            <code title="dom-networkservices-servicesavailable"><a href=
-            "#dom-networkservices-servicesavailable">servicesAvailable</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current number of items matching one of the app-requested <a href="#dfn-valid-service-type"
-                 class="internalDFN">valid service type</a> tokens in the <a href=
-                 "#dfn-list-of-available-service-records"
-                 class="internalDFN">list of available service records</a>.
-            </p>
-          </dd>
-        </dl>
-        <div>
-          <p>
-            The <dfn id="dom-networkservices-length"><code>length</code></dfn> attribute <em class="rfc2119"
-               title="MUST">MUST</em> return the number of <a href="#networkservice"><code>NetworkService</code></a>
-               objects represented by the collection.
-          </p>
-          <p>
-            The <dfn id="dom-networkservices-servicesavailable"><code>servicesAvailable</code></dfn> attribute
-            <em class="rfc2119"
-               title="MUST">MUST</em> return the number of services in the <a href=
-               "#dfn-list-of-available-service-records"
-               class="internalDFN">list of available service records</a> whose <code>type</code> attribute matches any
-               of the <a href="#dfn-valid-service-type"
-               class="internalDFN">valid service type</a> tokens that were initially used to create the current <a href=
-               "#networkservices"><code>NetworkServices</code></a> object.
-          </p>
-        </div>
-      </section>
-      <section id="methods-1">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_methods-1">
-          <span class="secno">6.2</span> Methods
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <code title="networkservices-getter"><a href="#networkservices">services</a></code> [ <var title=
-            "">index</var> ]
-          </dt>
-          <dd>
-            <p>
-              Returns the specified <a href="#networkservice"><code>NetworkService</code></a> object.
-            </p>
-          </dd>
-          <dt>
-            <code title="networkservices-getter"><a href="#networkservices">services</a></code> . <code title=
-            "dom-networkservices-getservicebyid"><a href=
-            "#dom-networkservices-getservicebyid">getServiceById</a></code> ( <var title="">id</var> )
-          </dt>
-          <dd>
-            <p>
-              Returns the <a href="#networkservice"><code>NetworkService</code></a> object with the given identifier,
-              or null if no service has that identifier.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          A <a href="#networkservices"><code>NetworkServices</code></a> object represents the current collection of
-          zero or more <a href="#networkservice"><code>NetworkService</code></a> objects - its <a href=
-          "#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a>. The <a href="#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a> of a <a href=
-             "#networkservices"><code>NetworkServices</code></a> object are <span>immutable</span> meaning that <a href=
-             "#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a> cannot be added and <a href="#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a> cannot be removed for the lifetime of a <a href=
-             "#networkservices"><code>NetworkServices</code></a> object.
-        </p>
-        <p>
-          The <a href=
-          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#supported-property-indices"
-             class="externalDFN">supported property indices</a> of <a href=
-             "#networkservices"><code>NetworkServices</code></a> objects at any instant are the numbers from zero to
-             the number of the <a href="#networkservice"><code>NetworkService</code></a> objects in the collection
-             minus one.
-        </p>
-        <div class="note">
-          <div class="note-title"
-               aria-level="3"
-               role="heading"
-               id="h_note_2">
-            <span>Note</span>
-          </div>
-          <p class="">
-            Each service in a <a href="#networkservices"><code>NetworkServices</code></a> object thus has an index; the
-            first has the index 0, and each subsequent service is numbered one higher than the previous one.
-          </p>
-        </div>
-        <p>
-          To <a href=
-          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#determine-the-value-of-an-indexed-property"
-             class="externalDFN">determine the value of an indexed property</a> for a given index <var>index</var> in a
-             <a href="#networkservices"><code>NetworkServices</code></a> object the user agent <em class="rfc2119"
-             title="MUST">MUST</em> return the <a href="#networkservice"><code>NetworkService</code></a> object that
-             represents the <var>index</var>th item in the collection.
-        </p>
-        <p>
-          The <dfn id="dom-networkservices-getservicebyid"><code>getServiceById(id)</code></dfn> method <em class=
-          "ct"><em class="rfc2119"
-              title="MUST">MUST</em></em> return the first <a href="#networkservice"><code>NetworkService</code></a>
-              object in the collection whose <a href="#dom-networkservice-id"><code>id</code></a> attribute is equal to
-              the value of the <var>id</var> argument provided. When no <a href=
-              "#networkservice"><code>NetworkService</code></a> objects match the given argument, the method <em class=
-              "rfc2119"
-             title="MUST">MUST</em> return null.
-        </p>
-      </section>
-      <section id="events">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_events">
-          <span class="secno">6.3</span> Events
-        </h3>
-        <p>
-          The following are the event handlers (and their corresponding event handler event types) that <em class=
-          "ct"><em class="rfc2119"
-              title="MUST">MUST</em></em> be supported, as IDL attributes, by all objects implementing the <a href=
-              "#networkservices"><code>NetworkServices</code></a> interface:
-        </p>
-        <table border="1">
-          <thead>
-            <tr>
-              <th>
-                <span title="event handlers">Event handler</span>
-              </th>
-              <th>
-                <span>Event handler event type</span>
-              </th>
-            </tr>
-          </thead>
-          <tbody>
-            <tr>
-              <td>
-                <dfn id="dom-networkservices-onservicefound"
-                    title="dom-NetworkServices-onservicefound"><code>onservicefound</code></dfn>
-              </td>
-              <td>
-                <a href="#event-servicefound"><code>servicefound</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservices-onservicelost"
-                    title="dom-NetworkServices-onservicelost"><code>onservicelost</code></dfn>
-              </td>
-              <td>
-                <a href="#event-servicelost"><code>servicelost</code></a>
-              </td>
-            </tr>
-          </tbody>
-        </table>
-      </section>
-    </section>
-    <section id="communicating-with-a-networked-service">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_communicating-with-a-networked-service">
-        <span class="secno">7.</span> Communicating with a networked service
-      </h2>
-      <p>
-        The <a href="#networkservice"><code>NetworkService</code></a> interface is used to provide a set of connection
-        information for an <abbr title="Hypertext Transfer Protocol">HTTP</abbr> service endpoint and if available,
-        service events, running on a networked device.
-      </p>
-      <pre class="widl">
-[NoInterfaceObject]
-interface <dfn id="networkservice">NetworkService</dfn> {
-  readonly attribute DOMString        <a href="#dom-networkservice-id">id</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-name">name</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-type">type</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-url">url</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-config">config</a>;
-
-  readonly attribute boolean          <a href="#dom-networkservice-online">online</a>;
-
-  // event handler attributes
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onavailable">onavailable</a>;
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onunavailable">onunavailable</a>;
-
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onnotify">onnotify</a>;
-};
-
-<a href="#networkservice">NetworkService</a> implements <a href=
-"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
-     class="externalDFN">EventTarget</a>;
-</pre>
-      <section id="attributes-1">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_attributes-1">
-          <span class="secno">7.1</span> Attributes
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-id"><a href=
-            "#dom-networkservice-id">id</a></code>
-          </dt>
-          <dd>
-            <p>
-              A unique identifier for the given user-selected service instance.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-name"><a href=
-            "#dom-networkservice-name">name</a></code>
-          </dt>
-          <dd>
-            <p>
-              The name of the user-selected service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-type"><a href=
-            "#dom-networkservice-type">type</a></code>
-          </dt>
-          <dd>
-            <p>
-              The <a href="#dfn-valid-service-type"
-                 class="internalDFN">valid service type</a> token value of the user-selected service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-url"><a href=
-            "#dom-networkservice-url">url</a></code>
-          </dt>
-          <dd>
-            <p>
-              The control URL endpoint (including any required port information) of the user-selected control service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-config"><a href=
-            "#dom-networkservice-config">config</a></code>
-          </dt>
-          <dd>
-            <p>
-              The configuration information associated with the service depending on the requested service type.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-networkservice-id"><code>id</code></dfn> attribute is a unique identifier for the service.
-          The same service provided at different times or on different objects <em class="rfc2119"
-             title="MUST">MUST</em> have the same <a href="#dom-networkservice-id"><code>id</code></a> value.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-name"><code>name</code></dfn> attribute represents a human-readable title for
-          the service.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-type"><code>type</code></dfn> attribute reflects the value of the <a href=
-          "#dfn-valid-service-type"
-             class="internalDFN">valid service type</a> of the service.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-url"><code>url</code></dfn> attribute is an <a href=
-          "http://url.spec.whatwg.org/#concept-absolute-url"
-             class="externalDFN">absolute URL</a> pointing to the root <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr> endpoint for the service. Web pages can subsequently use this
-             value for implicit cross-document messaging via various existing mechanisms (e.g. Web Sockets, Server-Sent
-             Events, Web Messaging, XMLHttpRequest).
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-config"><code>config</code></dfn> attribute provides the raw configuration
-          information extracted from the given network service.
-        </p>
-      </section>
-      <section id="states">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_states">
-          <span class="secno">7.2</span> States
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-online"><a href=
-            "#dom-networkservice-online">online</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns <code>true</code> if the service is reporting that it is accessible on the local network or
-              <code>false</code> if the service is no longer accessible (temporarily or permanently) on the local
-              network.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-networkservice-online"><code>online</code></dfn> attribute indicates whether the service is
-          either <var>online</var>, and therefore accessible on the local network, in which case this attribute will
-          return <code>true</code> or, <var>offline</var>, and therefore not accessible on the local network, either
-          temporarily or permanently, in which case this attribute will return <code>false</code>. This attribute
-          <em class="rfc2119"
-             title="MUST">MUST</em> default to <code>true</code>.
-        </p>
-      </section>
-      <section id="events-1">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_events-1">
-          <span class="secno">7.3</span> Events
-        </h3>
-        <p>
-          The following are the event handlers (and their corresponding event handler event types) that <em class=
-          "ct"><em class="rfc2119"
-              title="MUST">MUST</em></em> be supported, as IDL attributes, by all objects implementing the <a href=
-              "#networkservice"><code>NetworkService</code></a> interface:
-        </p>
-        <table border="1">
-          <thead>
-            <tr>
-              <th>
-                <span title="event handlers">Event handler</span>
-              </th>
-              <th>
-                <span>Event handler event type</span>
-              </th>
-            </tr>
-          </thead>
-          <tbody>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onnotify"
-                    title="dom-NetworkService-onnotify"><code>onnotify</code></dfn>
-              </td>
-              <td>
-                <a href="#event-notify"><code>notify</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onavailable"
-                    title="dom-NetworkService-onavailable"><code>onavailable</code></dfn>
-              </td>
-              <td>
-                <a href="#event-available"><code>available</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onunavailable"
-                    title="dom-NetworkService-onunavailable"><code>onunavailable</code></dfn>
-              </td>
-              <td>
-                <a href="#event-unavailable"><code>unavailable</code></a>
-              </td>
-            </tr>
-          </tbody>
-        </table>
-      </section>
-    </section>
-    <section id="service-discovery">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_service-discovery">
-        <span class="secno">8.</span> Service Discovery
-      </h2>
-      <p>
-        A <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> conforming to this specification <em class="rfc2119"
-           title="MAY">MAY</em> implement <abbr title="Simple Service Discovery Protocol">SSDP</abbr> [<cite><a class=
-           "bibref"
-           href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>], Zeroconf [<cite><a class="bibref"
-           href="#bib-DNS-SD">DNS-SD</a></cite>] + [<cite><a class="bibref"
-           href="#bib-MDNS">MDNS</a></cite>] and/or <abbr title="Discovery and Launch Protocol">DIAL</abbr> [<a href=
-           "https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification"><abbr title=
-           "Discovery and Launch Protocol">DIAL</abbr></a>] <dfn id="dfn-service-discovery-mechanisms">service
-           discovery mechanisms</dfn> - the requirements detailed in this section of the specification - to enable Web
-           pages to request and connect with <abbr title="Hypertext Transfer Protocol">HTTP</abbr> services running on
-           networked devices, discovered via any of these mechanisms, through this <abbr title=
-           "Application Programming Interface">API</abbr>. When a <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> implements any of these <a href="#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a>, then it <em class="rfc2119"
-           title="MUST">MUST</em> conform to the corresponding algorithms provided in this section of the
-           specification.
-      </p>
-      <p>
-        This section presents how the results of these <a href="#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a> will be matched to requested service types, how the
-           user agent stores available and active services and how their properties are applied to any resulting
-           <a href="#networkservice"><code>NetworkService</code></a> objects.
-      </p>
-      <p>
-        It is expected that user agents will perform these <a href="#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a> asynchronously and periodically update the <a href=
-           "#dfn-list-of-available-service-records"
-           class="internalDFN">list of available service records</a> as required. The timing of any <a href=
-           "#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a> is an implementation detail left to the discretion of
-           the implementer (e.g. by continuously monitoring the network as a background process or on invocation of
-           this <abbr title="Application Programming Interface">API</abbr> from a Web page).
-      </p>
-      <p>
-        The <dfn id="dfn-list-of-available-service-records">list of available service records</dfn> is a single dynamic
-        internal lookup table within user agents that is used to track all the services that have been discovered and
-        are available in the current network at the current time. At any point during the running of any of the
-        <a href="#dfn-service-discovery-mechanisms"
-           class="internalDFN">service discovery mechanisms</a> then existing entries within this table can be updated,
-           entries can be added and entries can be removed as the status of networked services changes according to the
-           rules defined in this specification.
-      </p>
-      <p>
-        The <dfn id="dfn-list-of-active-service-managers">list of active service managers</dfn> is an internal list
-        within user agents that is used to track all <a href="#networkservices"><code>NetworkServices</code></a>
-        objects currently being shared with any web pages at the current time within the user agent. Each <a href=
-        "#networkservices"><code>NetworkServices</code></a> object in the <a href=
-        "#dfn-list-of-active-service-managers"
-           class="internalDFN">list of active service managers</a> represents a collection of zero or more <a href=
-           "#networkservice"><code>NetworkService</code></a> objects - known as its <dfn id=
-           "dfn-indexed-properties">indexed properties</dfn>. <a href="#networkservice"><code>NetworkService</code></a>
-           objects are attached as the <a href="#dfn-indexed-properties"
-           class="internalDFN">indexed properties</a> of a <a href="#networkservices"><code>NetworkServices</code></a>
-           object as part of the <a href="#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a>
-           algorithm.
-      </p>
-      <p>
-        The rule for <dfn id="dfn-adding-an-available-service">adding an available service</dfn> is the process of
-        adding a <a href="#dfn-new-service"
-           class="internalDFN">new service</a> or updating an <a href="#dfn-existing-service"
-           class="internalDFN">existing service</a> that is generally available on the user's current network in the
-           <a href="#dfn-list-of-available-service-records"
-           class="internalDFN">list of available service records</a>. This rule takes one argument, <var>network
-           service record</var>, and consists of running the following steps:
-      </p>
-      <ol class="rule">
-        <li>For each <var>existing service record</var> in the current <a href="#dfn-list-of-available-service-records"
-              class="internalDFN">list of available service records</a>, run the following sub-steps:
-          <ol class="rule">
-            <li>If the <var>existing service record</var>'s <code>id</code> property does not equal <var>network
-            service record</var>'s <code>id</code> property then abort any remaining sub-steps and continue at the next
-            available <var>existing service record</var>.
-            </li>
-            <li>Replace the value of <var>existing service record</var> in the current <a href=
-            "#dfn-list-of-available-service-records"
-                  class="internalDFN">list of available service records</a> with the value of <var>network service
-                  record</var>, aborting any remaining steps in this algorithm and return.
-            </li>
-          </ol>
-        </li>
-        <li>Add <var>network service record</var> to the <a href="#dfn-list-of-available-service-records"
-              class="internalDFN">list of available service records</a> as a new item.
-        </li>
-        <li>For each <var>service manager</var> in the <a href="#dfn-list-of-active-service-managers"
-              class="internalDFN">list of active service managers</a> run the following steps:
-          <ol class="rule">
-            <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
-              <ol class="rule">
-                <li>If the <var>network service record</var>'s <code>id</code> property equals the <var>active
-                service</var>'s <code>id</code> attribute and <var>active service</var>'s <code>online</code> attribute
-                is currently set to <code>false</code> then set <var>active service</var>'s <a href=
-                "#dom-networkservice-online"><code>online</code></a> attribute to <code>true</code> and then <a href=
-                "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                      class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                      "#event-available"><code>available</code></a> that uses the <a href=
-                      "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                      class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable,
-                      and has no default action, at the current <var>active service</var> object.
-                </li>
-              </ol>
-            </li>
-            <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
-            </li>
-            <li>For each <var>requested control type</var> of the <var>requested control types</var> in <var>service
-            manager</var> run the following steps:
-              <ol class="rule">
-                <li>If <var>network service record</var>'s <code>type</code> property does not equal <var>requested
-                control type</var> then abort any remaining sub-steps and continue at the next available <var>requested
-                control type</var>.
-                </li>
-                <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code>, abort any
-                remaining sub-steps and continue.
-                </li>
-              </ol>
-            </li>
-            <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
-            increment <var>service manager</var>'s <a href=
-            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code> and
-            then <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                  class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                  "#event-servicefound"><code>servicefound</code></a> that uses the <a href=
-                  "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable, and
-                  has no default action, at the current <var>service manager</var> object.
-            </li>
-          </ol>
-        </li>
-      </ol>
-      <p>
-        The rule for <dfn id="dfn-removing-an-available-service">removing an available service</dfn> is the general
-        process of removing an <a href="#dfn-existing-service"
-           class="internalDFN">existing service</a> from the <a href="#dfn-list-of-available-service-records"
-           class="internalDFN">list of available service records</a> that has left the user's current network or has
-           otherwise expired. This rule takes one argument, <var>service identifier</var>, and consists of running the
-           following steps:
-      </p>
-      <ol class="rule">
-        <li>For each <var>existing service record</var> in the current <a href="#dfn-list-of-available-service-records"
-              class="internalDFN">list of available service records</a>, run the following sub-steps:
-          <ol class="rule">
-            <li>If the <var>existing service record</var>'s <code>id</code> property does not match <var>service
-            identifier</var> then skip any remaining sub-steps for the current <var>existing service record</var> and
-            continue at the next available <var>existing service record</var>.
-            </li>
-            <li>Let <var>'service type in use' flag</var> be <code>false</code>.
-            </li>
-            <li>For each <var>service manager</var> in the <a href="#dfn-list-of-active-service-managers"
-                  class="internalDFN">list of active service managers</a> run the following steps:
-              <ol class="rule">
-                <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
-                </li>
-                <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
-                  <ol class="rule">
-                    <li>If <var>existing service record</var>'s <code>id</code> property equals the <var>active
-                    service</var>'s <code>id</code> attribute and <var>active service</var>'s <a href=
-                    "#dom-networkservice-online"><code>online</code></a> attribute is currently set to
-                    <code>true</code> then set <var>active service</var>'s <a href="#dom-networkservice-online"><code>
-                      online</code></a> attribute to <code>false</code> and then <a href=
-                      "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                          class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                          "#event-unavailable"><code>unavailable</code></a> that uses the <a href=
-                          "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                          class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not
-                          cancellable, and has no default action, at the current <var>active service</var>.
-                    </li>
-                  </ol>
-                </li>
-                <li>For each <var>requested control type</var> of the <var>requested control types</var> in
-                <var>service manager</var> run the following steps:
-                  <ol class="rule">
-                    <li>If <var>existing service record</var>'s <code>type</code> property does not equal
-                    <var>requested control type</var> then abort any remaining sub-steps and continue at the next
-                    available <var>requested control type</var>.
-                    </li>
-                    <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code> and the
-                    <var>'service type in use' flag</var> to <code>true</code>, abort any remaining sub-steps and
-                    continue.
-                    </li>
-                  </ol>
-                </li>
-                <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
-                decrement <var>service manager</var>'s <a href=
-                "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code>
-                and then <a href=
-                "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                      class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                      "#event-servicelost"><code>servicelost</code></a> that uses the <a href=
-                      "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                      class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable,
-                      and has no default action, at the current <var>service manager</var> object.
-                </li>
-              </ol>
-            </li>
-            <li>If the <var>'service type in use' flag</var> is <code>false</code> and the <var>existing service
-            record</var>'s <code>type</code> property begins with the DOMString "<code>upnp:</code>" and <var>existing
-            service record</var>'s <code>eventsURL</code> property is set then run the rule to <a href=
-            "#dfn-terminate-an-existing-upnp-events-subscription"
-                  class="internalDFN">terminate an existing UPnP Events Subscription</a>, if one is currently active
-                  (as a result of having previously called <a href="#dfn-setup-a-upnp-events-subscription"
-                  class="internalDFN">setup a UPnP Events Subscription</a> against the current <var>existing service
-                  record</var>).
-            </li>
-            <li>Remove <var>existing service record</var> from the current <a href=
-            "#dfn-list-of-available-service-records"
-                  class="internalDFN">list of available service records</a>.
-            </li>
-          </ol>
-        </li>
-      </ol>
-      <p>
-        User agents <em class="rfc2119"
-           title="SHOULD">SHOULD</em> expire a service record from the <a href="#dfn-list-of-available-service-records"
-           class="internalDFN">list of available service records</a> when its <code>expiryTimestamp</code> attribute
-           exceeds the current UTC timestamp. When this condition is met the <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> <em class="rfc2119"
-           title="SHOULD">SHOULD</em> run the rule for <a href="#dfn-removing-an-available-service"
-           class="internalDFN">removing an available service</a>, passing in the expired service record's
-           <code>id</code> attribute as the only argument.
-      </p>
-      <section id="zeroconf-mdns-dns-sd">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_zeroconf-mdns-dns-sd">
-          <span class="secno">8.1</span> Zeroconf (<abbr title="Multicast DNS">mDNS</abbr> + <abbr title=
-          "Domain Name System">DNS</abbr>-<abbr title="Service Discovery">SD</abbr>)
-        </h3>
-        <p>
-          For each <abbr title="Domain Name System">DNS</abbr> response received from a user-agent-initiated Multicast
-          <abbr title="Domain Name System">DNS</abbr> Browse for <abbr title="DNS Pointer Record">PTR</abbr> records
-          with the name <code>_services._dns-sd._udp</code> on the resolved recommended automatic browsing domain
-          [<cite><a class="bibref"
-             href="#bib-MDNS">MDNS</a></cite>], the <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>service <abbr title="Multicast DNS">mDNS</abbr> responses</var> be an array of <abbr title=
-          "DNS Pointer Record">PTR</abbr> records received by issuing a Multicast <abbr title=
-          "Domain Name System">DNS</abbr> Browse for <abbr title="DNS Pointer Record">PTR</abbr> records with the name
-          of the current discovered service type.
-          </li>
-          <li>For each Object <var>service <abbr title="Multicast DNS">mDNS</abbr> response</var> in <var>service
-          <abbr title="Multicast DNS">mDNS</abbr> responses</var>, run the following steps:
-            <ol>
-              <li>Let <var>network service record</var> be an Object consisting of the following empty properties:
-              <code>id</code>, <code>name</code>, <code>type</code>, <code>url</code>, <code>config</code>,
-              <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the value of the full
-                <abbr title="DNS Pointer Record">PTR</abbr> Service Instance Name [<cite><a class="bibref"
-                   href="#bib-MDNS">MDNS</a></cite>].
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the value of the <abbr title=
-              "DNS Pointer Record">PTR</abbr> Service Instance Name's <var>Instance</var> component [<cite><a class=
-              "bibref"
-                   href="#bib-MDNS">MDNS</a></cite>].
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to the concatenation of the string
-              <code>zeroconf:</code> followed be the value of the <abbr title="DNS Pointer Record">PTR</abbr> Service
-              Instance Name's <var>Service</var> component [<cite><a class="bibref"
-                   href="#bib-MDNS">MDNS</a></cite>].
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the resolvable Service URL
-              obtained from performing an <abbr title="Domain Name System">DNS</abbr>-<abbr title=
-              "Service Discovery">SD</abbr> Lookup [<cite><a class="bibref"
-                   href="#bib-DNS-SD">DNS-SD</a></cite>] of the current service from the <abbr title=
-                   "DNS Pointer Record">PTR</abbr> record provided [<cite><a class="bibref"
-                   href="#bib-MDNS">MDNS</a></cite>].
-              </li>
-              <li>Set <var>network service record</var>'s <code>config</code> property to the string value of the
-              contents of the first <abbr title="Domain Name System">DNS</abbr>-<abbr title=
-              "Service Discovery">SD</abbr> TXT record associated with the <var>service <abbr title=
-              "Multicast DNS">mDNS</abbr> response</var> as defined in [<cite><a class="bibref"
-                   href="#bib-DNS-SD">DNS-SD</a></cite>].
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus a value of <code>120</code> seconds.
-              </li>
-              <li>Run the general rule for <a href="#dfn-adding-an-available-service"
-                    class="internalDFN">adding an available service</a>, passing in the current <var>network service
-                    record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-      </section>
-      <section id="simple-service-discovery-protocol-ssdp">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_simple-service-discovery-protocol-ssdp">
-          <span class="secno">8.2</span> Simple Service Discovery Protocol (<abbr title=
-          "Simple Service Discovery Protocol">SSDP</abbr>)
-        </h3>
-        <p>
-          A user agent that implements UPnP service discovery <em class="rfc2119"
-             title="MUST">MUST</em> issue a <dfn id="dfn-search-request-for-upnp-root-devices">search request for UPnP
-             root devices</dfn> against the user's current local network according to the full normative text and
-             timing provided in 'Section 1.3.2: Search request with M-SEARCH' detailed in [<cite><a class="bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>].
-        </p>
-        <p>
-          The user agent <em class="rfc2119"
-             title="MUST">MUST</em> issue all <a title="search request for UPnP root devices"
-             href="#dfn-search-request-for-upnp-root-devices"
-             class="internalDFN">search requests for UPnP root devices</a> with a <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr> request line equal to <code>M-SEARCH * <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr>/1.1</code>, with a HOST header equal to the reserved multicast
-             address and port of <code>239.255.255.250:1900</code> and a MAN header equal to
-             <code>ssdp:discover</code>. The <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> must also send an ST header with this <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr> request equal to the String value of <code>ssdp:all</code> or
-             <code>upnp:rootdevice</code> or a single <a href="#dfn-valid-service-type"
-             class="internalDFN">valid service type</a> token beginning with the String value <code>upnp:</code>. If a
-             single <a href="#dfn-valid-service-type"
-             class="internalDFN">valid service type</a> token beginning with the String value <code>upnp:</code> is to
-             be used, the user agent <em class="rfc2119"
-             title="MUST">MUST</em> strip the leading String <code>upnp:</code> before using this value in this
-             <abbr title="Hypertext Transfer Protocol">HTTP</abbr> request. The user-agent <em class="rfc2119"
-             title="MUST">MUST</em> also send an MX header equal to a <dfn id=
-             "dfn-maximum-upnp-advertisement-response-wait-time">maximum UPnP advertisement response wait time</dfn>
-             value between <code>1</code> and <code>5</code> seconds with this <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr> request.
-        </p>
-        <p>
-          The user agent <em class="rfc2119"
-             title="MUST">MUST</em> listen for any incoming responses to any <a href=
-             "#dfn-search-request-for-upnp-root-devices"
-             class="internalDFN">search request for UPnP root devices</a>.
-        </p>
-        <p>
-          For each <dfn id="dfn-http-response"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</dfn>
-          following an initial <a href="#dfn-search-request-for-upnp-root-devices"
-             class="internalDFN">search request for UPnP root devices</a> sent on a <a href=
-             "#dfn-standard-upnp-address-and-port"
-             class="internalDFN">standard UPnP address and port</a> the user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a> is not a
-                <abbr title="Hypertext Transfer Protocol">HTTP</abbr> 200 OK response then this response is invalid and
-                the user agent <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return. The user agent
-                <em class="rfc2119"
-                title="MAY">MAY</em> issue a new <a href="#dfn-search-request-for-upnp-root-devices"
-                class="internalDFN">search request for UPnP root devices</a> as a result of this error occurring.
-          </li>
-          <li>If the <a href="#dfn-maximum-upnp-advertisement-response-wait-time"
-                class="internalDFN">maximum UPnP advertisement response wait time</a> has been exceeded since the
-                initial <a href="#dfn-search-request-for-upnp-root-devices"
-                class="internalDFN">search request for UPnP root devices</a> was sent then the <a href=
-                "#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a> is invalid and
-                the user agent <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return. The user agent
-                <em class="rfc2119"
-                title="MAY">MAY</em> stop listening for responses from the current <a href=
-                "#dfn-search-request-for-upnp-root-devices"
-                class="internalDFN">search request for UPnP root devices</a> as a result of this error occurring.
-                Equally, the user agent <em class="rfc2119"
-                title="MAY">MAY</em> issue a new <a href="#dfn-search-request-for-upnp-root-devices"
-                class="internalDFN">search request for UPnP root devices</a> as a result of this error occurring.
-          </li>
-          <li>Let <var>ssdp device</var> be an Object with a property for each <abbr title=
-          "Hypertext Transfer Protocol">HTTP</abbr> header received in the <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a>, with each key
-                being the name of a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> response header and each
-                value being that <abbr title="Hypertext Transfer Protocol">HTTP</abbr> response header's value.
-          </li>
-          <li>If <var>ssdp device</var> does not contain at least one <var>CACHE-CONTROL</var> entry, at least one
-          <var>USN</var> entry, at least one <var>ST</var> entry and at least one <var>LOCATION</var> entry then the
-          <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a> is invalid and
-                the <a href="#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return.
-          </li>
-          <li>The user agent <em class="rfc2119"
-                title="MUST">MUST</em> run the rule for <a href="#dfn-obtaining-a-upnp-device-description-file"
-                class="internalDFN">obtaining a UPnP Device Description File</a> passing in the first occurrence of
-                <var>LOCATION</var> from <var>ssdp device</var> as the <var>device descriptor URL</var> argument and
-                the first occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device identifier</var>
-                argument and the first occurrence of <var>CACHE-CONTROL</var> from <var>ssdp device</var> (minus the
-                leading string of <code>max-age=</code>) as the <var>device expiry</var> argument.
-          </li>
-        </ol>
-        <p>
-          The user agent <em class="rfc2119"
-             title="MUST">MUST</em> listen for incoming requests on the <dfn id=
-             "dfn-standard-upnp-address-and-port">standard UPnP address and port</dfn> on all current local network
-             interface addresses with the port <code>1900</code>.
-        </p>
-        <p>
-          For each <dfn id="dfn-http-request"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Request</dfn>
-          received on a <a href="#dfn-standard-upnp-address-and-port"
-             class="internalDFN">standard UPnP address and port</a> the user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the <a href="#dfn-http-request"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Request</a> is not a
-                <abbr title="Hypertext Transfer Protocol">HTTP</abbr> NOTIFY request then it is not a valid UPnP
-                Request and the user agent <em class="rfc2119"
-                title="MUST">MUST</em> discard this request, abort any remaining steps and return.
-          </li>
-          <li>Let <var>ssdp device</var> be an Object with a property for each <abbr title=
-          "Hypertext Transfer Protocol">HTTP</abbr> header received in the <a href="#dfn-http-request"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Request</a>, with each key
-                being the name of a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> header and each value being
-                that <abbr title="Hypertext Transfer Protocol">HTTP</abbr> header's value.
-          </li>
-          <li>If <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:alive</code> and the <a href=
-          "#dfn-http-request"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Request</a> does not contain
-                at least one <var>CACHE-CONTROL</var> entry, at least one <var>USN</var> entry, at least one
-                <var>NT</var> entry, at least one <var>NTS</var> entry and at least one <var>LOCATION</var> entry, then
-                the <a href="#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> discard this request, abort any remaining steps and return.
-          </li>
-          <li>If <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:alive</code> then the user agent
-          <em class="rfc2119"
-                title="MUST">MUST</em> run the rule for <a href="#dfn-obtaining-a-upnp-device-description-file"
-                class="internalDFN">obtaining a UPnP Device Description File</a> passing in the first occurrence of
-                <var>LOCATION</var> from <var>ssdp device</var> as the <var>device descriptor URL</var> argument and
-                the first occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device identifier</var>
-                argument and the first occurrence of <var>CACHE-CONTROL</var> from <var>ssdp device</var> (minus the
-                leading string of <code>max-age=</code>) as the <var>device expiry</var>.<br>
-            <br>
-            Otherwise, if <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:byebye</code> then the
-            user agent <em class="rfc2119"
-                title="MUST">MUST</em> run the rule for <a href=
-                "#dfn-removing-all-services-from-a-registered-upnp-device"
-                class="internalDFN">removing all services from a registered UPnP Device</a> passing in the first
-                occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device identifier</var> argument.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn id="dfn-obtaining-a-upnp-device-description-file">obtaining a UPnP Device Description
-          File</dfn> is the process of obtaining the contents of a standard UPnP Device Description [<cite><a class=
-          "bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>] from a URL-based resource. This rule takes
-             three arguments - <var>device descriptor URL</var>, <var>device identifier</var> and <var>device
-             expiry</var> - and when called the user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>device descriptor file</var> contain the contents of the file located at the URL provided in
-          <var>device descriptor URL</var> obtained according to the rules defined in 'Section 2.11: Retrieving a
-          description using <abbr title="Hypertext Transfer Protocol">HTTP</abbr>' in [<cite><a class="bibref"
-               href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>].
-          </li>
-          <li>If the value provided in <var>device descriptor URL</var> cannot be resolved as a reachable URL on the
-          current network or the <var>device descriptor file</var> remains empty then it is invalid and the <a href=
-          "#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> abort any remaining steps and return.
-          </li>
-          <li>Run the rule for <a href="#dfn-processing-a-upnp-device-description-file"
-                class="internalDFN">processing a UPnP Device Description File</a>, passing in the current <var>device
-                descriptor file</var>, <var>device identifier</var> and <var>device expiry</var> arguments.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn id="dfn-processing-a-upnp-device-description-file">processing a UPnP Device Description
-          File</dfn> is the process of parsing the contents of a standard UPnP Device Description [<cite><a class=
-          "bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>] and registering the UPnP services contained
-             therein within the <a href="#dfn-list-of-available-service-records"
-             class="internalDFN">list of available service records</a>.
-        </p>
-        <p>
-          The rule for <a href="#dfn-processing-a-upnp-device-description-file"
-             class="internalDFN">processing a UPnP Device Description File</a> takes three arguments - <var>device
-             descriptor file</var>, <var>device identifier</var> and <var>device expiry</var> - and when called the
-             user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>advertised services</var> be a list of all advertised services obtained from the <var>device
-          descriptor file</var> containing the value of the first occurrence of the <code>&lt;serviceList&gt;</code>
-          element as it is defined in 'Section 2.3: Device Description' in [<cite><a class="bibref"
-               href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>].
-          </li>
-          <li>For each <code>&lt;service&gt;</code> element - known as an <var>advertised service</var> - in
-          <var>advertised services</var> run the following steps:
-            <ol class="rule">
-              <li>Let <var>network service record</var> be a new Object consisting of the following empty properties:
-              <code>id</code>, <code>deviceId</code>, <code>name</code>, <code>type</code>, <code>url</code>,
-              <code>eventsUrl</code>, <code>config</code>, <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the concatenated string value of
-              the first occurrence of the <code>&lt;UDN&gt;</code> element in the <var>device descriptor file</var>
-              with the <var>advertised service</var>'s <code>&lt;serviceId&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>deviceId</code> property to the value of <var>device
-              identifier</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;serviceId&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to the concatenation of the string
-              <code>upnp:</code> followed by the string value of the first occurrence of the <var>advertised
-              service</var>'s <code>&lt;serviceType&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;controlURL&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>config</code> property to the string value of the
-              contents of the first occurrence of the <code>&lt;device&gt;</code> element in the <var>device descriptor
-              file</var>.
-              </li>
-              <li>If <var>advertised service</var>'s <code>&lt;eventSubURL&gt;</code> sub-element is not empty, then
-              set <var>network service record</var>'s <code>eventsUrl</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;eventSubURL&gt;</code> sub-element.
-              Otherwise, do not set <var>network service record</var>'s <code>eventsUrl</code> property.
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus the value of <var>device expiry</var>.
-              </li>
-              <li>Run the general rule for <a href="#dfn-adding-an-available-service"
-                    class="internalDFN">adding an available service</a>, passing in the current <var>network service
-                    record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-          <li>If <var>device descriptor file</var> contains a <code>&lt;deviceList&gt;</code> element then for each
-          <code>&lt;device&gt;</code> element within <code>&lt;deviceList&gt;</code> - herein known as an <var>embedded
-          device descriptor file</var> - the user agent <em class="rfc2119"
-                title="MUST">MUST</em> run the rule for <a href="#dfn-processing-a-upnp-device-description-file"
-                class="internalDFN">processing a UPnP Device Description File</a>, passing in the current <var>embedded
-                device descriptor file</var> as the <var>device descriptor file</var> argument, along with the current
-                <var>device identifier</var> and <var>device expiry</var> arguments.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn id="dfn-removing-all-services-from-a-registered-upnp-device">removing all services from a
-          registered UPnP Device</dfn> is the process of removing all services associated with a device from the
-          <a href="#dfn-list-of-available-service-records"
-             class="internalDFN">list of available service records</a> that has left the user's current network or has
-             otherwise timed out or expired. This rule takes one argument, <var>device identifier</var>, and consists
-             of running the following steps:
-        </p>
-        <ol class="rule">
-          <li>For each <var>existing service record</var> in the current <a href=
-          "#dfn-list-of-available-service-records"
-                class="internalDFN">list of available service records</a>, run the following sub-steps:
-            <ol class="rule">
-              <li>If the <var>existing service record</var>'s <code>deviceId</code> property does not match <var>device
-              identifier</var> then skip any remaining sub-steps for the current <var>existing service record</var> and
-              continue at the next available <var>existing service record</var>.
-              </li>
-              <li>Run the general rule for <a href="#dfn-removing-an-available-service"
-                    class="internalDFN">removing an available service</a> passing in <var>existing service
-                    record</var>'s <code>id</code> property as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-        <p>
-          When the <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> is to <dfn id="dfn-setup-a-upnp-events-subscription">setup a UPnP
-             Events Subscription</dfn>, it is to run the following steps with the current <var>network service
-             record</var> object as defined in 'Section 4.1.2: SUBSCRIBE with NT and CALLBACK' in [<cite><a class=
-             "bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>]:
-        </p>
-        <ol class="rule">
-          <li>If <var>network service record</var>'s <code>eventsUrl</code> property is empty then the <a href=
-          "#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> abort these steps.
-          </li>
-          <li>Let <var>callback URL</var> be the value of creating a new <a href=
-          "#dfn-user-agent-generated-callback-url"
-                class="internalDFN">user-agent generated callback url</a>.
-          </li>
-          <li>Send a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> SUBSCRIBE request with a <em>NT</em> header
-          with a string value of <code>upnp:event</code>, a <em>TIMEOUT</em> header with a user-agent defined timeout
-          value (in the form <code>Second-XX</code> where <code>XX</code> is the user-agent defined timeout value in
-          seconds) and a <em>CALLBACK</em> header with a string value of <var>callback URL</var> towards the
-          <var>network service record</var>'s <code>eventsUrl</code> property.
-          </li>
-          <li>If a non-200 OK response is received from the <abbr title="Hypertext Transfer Protocol">HTTP</abbr>
-          SUBSCRIBE request then the <a href="#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> abort these steps.
-          </li>
-          <li>On receiving a valid 200 OK response, run the following steps:
-            <ol class="rule">
-              <li>Let <var>callback ID</var> equal the string value of the first included <em>SID</em> header, if it
-              exists.
-              </li>
-              <li>Let <var>timeout date</var> equal the sum of the current UTC date value plus the integer value of the
-              first included <em>TIMEOUT</em> header (minus the leading string of <code>Second-</code>), if it exists.
-              </li>
-              <li>Run the following steps asynchronously and continue to the step labeled <em>listen</em> below.
-              </li>
-              <li>
-                <em>Refresh Subscription</em>: Run the following steps at a set interval (X) within the <a href=
-                "#dfn-user-agent"
-                    class="internalDFN">user agent</a>:
-                <ol class="rule">
-                  <li>Let <var>current date</var> equal the current UTC date.
-                  </li>
-                  <li>If <var>current date</var> is less than the <var>timeout date</var> then continue to the step
-                  labeled <em>refresh subscription</em> above.
-                  </li>
-                  <li>Send a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> SUBSCRIBE request with a
-                  <em>SID</em> header with the string value of <var>callback ID</var> and a user-agent defined
-                  <em>TIMEOUT</em> header (in the form <code>Second-XX</code> where <code>XX</code> is the user-agent
-                  defined timeout value in seconds) towards the <var>network service record</var>'s
-                  <code>eventsUrl</code> property.
-                  </li>
-                  <li>On receiving a valid 200 OK, update <var>callback ID</var> with the string value of the first
-                  included <em>SID</em> header and set <var>timeout date</var> to the sum of the current UTC date value
-                  plus the integer value of the first included <em>TIMEOUT</em> header (minus the leading string of
-                  <code>Second-</code>), if it exists. If the current date is greater than or equal to <var>timeout
-                  date</var> then the <a href="#dfn-user-agent"
-                        class="internalDFN">user agent</a> <em class="rfc2119"
-                        title="SHOULD">SHOULD</em> continue from the step labeled <em>refresh subscription</em> above.
-                        For all non 200 OK responses the <a href="#dfn-user-agent"
-                        class="internalDFN">user agent</a> <em class="rfc2119"
-                        title="SHOULD">SHOULD</em> continue from the step labeled <em>refresh subscription</em> above.
-                  </li>
-                </ol>
-              </li>
-              <li>
-                <em>Listen</em>: For each <abbr title="Hypertext Transfer Protocol">HTTP</abbr> NOTIFY request received
-                at the <var>callback URL</var> the <a href="#dfn-user-agent"
-                    class="internalDFN">user agent</a> is to run the following steps:
-                <ol class="rule">
-                  <li>Let <var>content clone</var> be the result of obtaining the message body of the <abbr title=
-                  "Hypertext Transfer Protocol">HTTP</abbr> NOTIFY request. If <var>content clone</var> is empty, then
-                  the <a href="#dfn-user-agent"
-                        class="internalDFN">user agent</a> <em class="rfc2119"
-                        title="MUST">MUST</em> abort these steps.
-                  </li>
-                  <li>Let <var>notification event</var> be a new simple event that uses the <a href=
-                  "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                        class="externalDFN"><code>Event</code></a> interface with the name <a href=
-                        "#event-notify"><code>notify</code></a>, which does not bubble, is not cancellable, and has no
-                        default action.
-                  </li>
-                  <li>Let the <code>data</code> attribute of <var>notification event</var> have the DOMString value of
-                  <var>content clone</var>.
-                  </li>
-                  <li>
-                    <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                        class="externalDFN">Queue a task</a> to dispatch <var>notification event</var> at the current
-                        <a href="#networkservice"
-                        class="internalDFN"><code>NetworkService</code></a> object.
-                  </li>
-                  <li>Return a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> 200 OK response to the sender of
-                  the <abbr title="Hypertext Transfer Protocol">HTTP</abbr> NOTIFY request.
-                  </li>
-                </ol>
-              </li>
-            </ol>
-          </li>
-        </ol>
-        <p>
-          A <a href="#dfn-user-agent"
-             class="internalDFN">user agent</a> can <dfn id=
-             "dfn-terminate-an-existing-upnp-events-subscription">terminate an existing UPnP Events Subscription</dfn>
-             at any time for a <var>network service record</var> by sending an <abbr title=
-             "Hypertext Transfer Protocol">HTTP</abbr> UNSUBSCRIBE request - as defined in 'Section 4.1.4: Cancelling a
-             subscription with UNSUBSCRIBE' in [<cite><a class="bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>] - with a HOST header set to that <var>active
-             service</var>'s <code>eventsUrl</code> property and a SID header set to the <var>callback ID</var>
-             obtained when the initial <a href="#dfn-setup-a-upnp-events-subscription"
-             class="internalDFN">setup a UPnP Events Subscription</a> action occurred.
-        </p>
-      </section>
-      <section id="discovery-and-launch-protocol-dial">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_discovery-and-launch-protocol-dial">
-          <span class="secno">8.3</span> Discovery and Launch Protocol (<abbr title=
-          "Discovery and Launch Protocol">DIAL</abbr>)
-        </h3>
-        <p>
-          A user agent that implements <abbr title="Discovery and Launch Protocol">DIAL</abbr> service discovery
-          <em class="rfc2119"
-             title="MUST">MUST</em> issue a <dfn id="dfn-search-request-for-dial-enabled-devices">search request for
-             <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled devices</dfn> against the user's current
-             local network according to the full normative text and timing provided in 'Section 1.3.2: Search request
-             with M-SEARCH' detailed in [<cite><a class="bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>].
-        </p>
-        <p>
-          Let <var>dial version</var> be the version number specified in the <a href="#dfn-valid-service-type"
-             class="internalDFN">valid service type</a> token. Let <var>dial search target</var> be the concatentation
-             of the <code>urn:dial-multiscreen-org:service:dial:</code> string constant with the <var>dial
-             version</var> (currently, <var>dial version</var> can only be <code>1</code>)
-        </p>
-        <p>
-          The user agent <em class="rfc2119"
-             title="MUST">MUST</em> issue all <a title="search request for DIAL-enabled devices"
-             href="#dfn-search-request-for-dial-enabled-devices"
-             class="internalDFN">search requests for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-             devices</a> with a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> request line equal to
-             <code>M-SEARCH * <abbr title="Hypertext Transfer Protocol">HTTP</abbr>/1.1</code>, with a HOST header
-             equal to the reserved multicast address and port of <code>239.255.255.250:1900</code>, a MAN header equal
-             to <code>ssdp:discover</code>, an ST header equal to <var>dial search target</var> and a user-agent
-             defined MX header equal to a <dfn id="dfn-maximum-dial-advertisement-response-wait-time">maximum
-             <abbr title="Discovery and Launch Protocol">DIAL</abbr> advertisement response wait time</dfn> value
-             between <code>1</code> and <code>5</code> seconds.
-        </p>
-        <p>
-          The user agent <em class="rfc2119"
-             title="MUST">MUST</em> listen for any incoming responses to a <a href=
-             "#dfn-search-request-for-dial-enabled-devices"
-             class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-             devices</a>.
-        </p>
-        <p>
-          For each <abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response following an initial <a href=
-          "#dfn-search-request-for-dial-enabled-devices"
-             class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-             devices</a> sent on a <a href="#dfn-standard-upnp-address-and-port"
-             class="internalDFN">standard UPnP address and port</a> the user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the <abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response is not a <abbr title=
-          "Hypertext Transfer Protocol">HTTP</abbr> 200 OK response then this response is invalid and the user agent
-          <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return. The user agent
-                <em class="rfc2119"
-                title="MAY">MAY</em> issue a new <a href="#dfn-search-request-for-dial-enabled-devices"
-                class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-                devices</a> as a result of this error occurring.
-          </li>
-          <li>If the <a href="#dfn-maximum-dial-advertisement-response-wait-time"
-                class="internalDFN">maximum <abbr title="Discovery and Launch Protocol">DIAL</abbr> advertisement
-                response wait time</a> has been exceeded since the initial <a href=
-                "#dfn-search-request-for-dial-enabled-devices"
-                class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-                devices</a> was sent then the <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a> is invalid and
-                the user agent <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return. The user agent
-                <em class="rfc2119"
-                title="MAY">MAY</em> stop listening for responses from the current <a href=
-                "#dfn-search-request-for-dial-enabled-devices"
-                class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-                devices</a> as a result of this error occurring. Equally, the user agent <em class="rfc2119"
-                title="MAY">MAY</em> issue a new <a href="#dfn-search-request-for-dial-enabled-devices"
-                class="internalDFN">search request for <abbr title="Discovery and Launch Protocol">DIAL</abbr>-enabled
-                devices</a> as a result of this error occurring.
-          </li>
-          <li>Let <var>dial device</var> be an Object with a property for each <abbr title=
-          "Hypertext Transfer Protocol">HTTP</abbr> header received in the <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a>, with each key
-                being the name of a <abbr title="Hypertext Transfer Protocol">HTTP</abbr> response header and each
-                value being that <abbr title="Hypertext Transfer Protocol">HTTP</abbr> response header's value.
-          </li>
-          <li>If <var>dial device</var> does not contain at least one <var>CACHE-CONTROL</var> entry, at least one
-          <var>USN</var> entry, at least one <var>ST</var> entry and at least one <var>LOCATION</var> entry or the
-          value of its <var>ST</var> entry is not <var>dial search target</var>, then the <a href="#dfn-http-response"
-                class="internalDFN"><abbr title="Hypertext Transfer Protocol">HTTP</abbr> Response</a> is invalid and
-                the <a href="#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> discard this response, abort any remaining steps and return.
-          </li>
-          <li>The user agent <em class="rfc2119"
-                title="MUST">MUST</em> run the rule for <a href="#dfn-obtaining-a-upnp-device-description-file"
-                class="internalDFN">obtaining a UPnP Device Description File</a> passing in the first occurrence of
-                <var>LOCATION</var> from <var>dial device</var> as the <var>device descriptor URL</var> argument and
-                the first occurrence of <var>USN</var> from <var>dial device</var> as the <var>device identifier</var>
-                argument and the first occurrence of <var>CACHE-CONTROL</var> from <var>dial device</var> (minus the
-                leading string of <code>max-age=</code>) as the <var>device expiry</var> argument.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn id="dfn-obtaining-a-dial-device-description-file">obtaining a <abbr title=
-          "Discovery and Launch Protocol">DIAL</abbr> Device Description File</dfn> is the process of obtaining the
-          contents of a standard UPnP Device Description [<cite><a class="bibref"
-             href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>] from a URL-based resource. This rule takes
-             three arguments - <var>device descriptor URL</var>, <var>device identifier</var> and <var>device
-             expiry</var> - and when called the user agent <em class="rfc2119"
-             title="MUST">MUST</em> run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>device descriptor file</var> contain the contents of the file located at the URL provided in
-          <var>device descriptor URL</var> obtained according to the rules defined in 'Section 2.11: Retrieving a
-          description using <abbr title="Hypertext Transfer Protocol">HTTP</abbr>' in [<cite><a class="bibref"
-               href="#bib-UPNP-DEVICEARCH11">UPNP-DEVICEARCH11</a></cite>].
-          </li>
-          <li>Let <var>application url</var> be the value of the first occurrence of the <code>Application-URL</code>
-          response header field obtained according to the rules defined in 'Section 5.4: Device Description Response'
-          in [<a href="https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification"><abbr title=
-          "Discovery and Launch Protocol">DIAL</abbr></a>]
-          </li>
-          <li>If the value provided in <var>device descriptor URL</var> cannot be resolved as a reachable URL on the
-          current network or the <var>device descriptor file</var> remains empty or <var>application url</var> is
-          undefined then it is invalid and the <a href="#dfn-user-agent"
-                class="internalDFN">user agent</a> <em class="rfc2119"
-                title="MUST">MUST</em> abort any remaining steps and return.
-          </li>
-          <li>Run the following steps to add the newly discovered <abbr title=
-          "Discovery and Launch Protocol">DIAL</abbr> service:
-            <ol class="rule">
-              <li>Let <var>network service record</var> be a new Object consisting of the following empty properties:
-              <code>id</code>, <code>deviceId</code>, <code>name</code>, <code>type</code>, <code>url</code>,
-              <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the first occurrence of the
-              <code>&lt;UDN&gt;</code> element in the <var>descriptor file</var> prefixed with the <code>dial:</code>
-              string constant
-              </li>
-              <li>Set <var>network service record</var>'s <code>deviceId</code> property to the value of <var>device
-              identifier</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the string value of the first
-              occurrence of the <code>&lt;friendlyName&gt;</code> element in the <var>descriptor file</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to <var>dial search target</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the string value of the
-              <var>application url</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus the value of <var>device expiry</var>.
-              </li>
-              <li>Run the general rule for <a href="#dfn-adding-an-available-service"
-                    class="internalDFN">adding an available service</a>, passing in the current <var>network service
-                    record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-      </section>
-      <section id="network-topology-monitoring">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_network-topology-monitoring">
-          <span class="secno">8.4</span> Network Topology Monitoring
-        </h3>
-        <div>
-          <p>
-            When the <a href="#dfn-user-agent"
-               class="internalDFN">user agent</a> detects that the user has dropped from a connected network then, for
-               each <var>existing service record</var> in the <a href="#dfn-list-of-available-service-records"
-               class="internalDFN">list of available service records</a> discovered via that network connection, the
-               <a href="#dfn-user-agent"
-               class="internalDFN">user agent</a> <em class="rfc2119"
-               title="MUST">MUST</em> run the general rule for <a href="#dfn-removing-an-available-service"
-               class="internalDFN">removing an available service</a> passing in each <var>existing service
-               record</var>'s <code>id</code> property as the only argument for each call.
-          </p>
-          <p>
-            When the <a href="#dfn-user-agent"
-               class="internalDFN">user agent</a> detects that the user has connected to a new network or reconnected
-               to an existing network, then it <em class="rfc2119"
-               title="SHOULD">SHOULD</em> restart its discovery mechanisms as defined in the <a href=
-               "#service-discovery">Service Discovery</a> section of this specification, maintaining the existing
-               <a href="#dfn-list-of-active-service-managers"
-               class="internalDFN">list of active service managers</a> currently in use.
-          </p>
-        </div>
-      </section>
-    </section>
-    <section id="events-summary">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_events-summary">
-        <span class="secno">9.</span> Events Summary
-      </h2>
-      <p>
-        The following events are dispatched on the <a href="#networkservices"><code>NetworkServices</code></a> and/or
-        <a href="#networkservice"><code>NetworkService</code></a> objects:
-      </p>
-      <table border="1">
-        <thead>
-          <tr>
-            <th>
-              <span>Event name</span>
-            </th>
-            <th>
-              <span>Interface</span>
-            </th>
-            <th>
-              <span>Dispatched when...</span>
-            </th>
-          </tr>
-        </thead>
-        <tbody>
-          <tr>
-            <td>
-              <dfn id="event-servicefound"><code>servicefound</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a href="#dfn-new-service"
-                  class="internalDFN">new service</a> that matches one of the <a title="valid service type"
-                  href="#dfn-valid-service-type"
-                  class="internalDFN">requested type tokens</a> is found in the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-servicelost"><code>servicelost</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When an <a href="#dfn-existing-service"
-                  class="internalDFN">existing service</a> that matches one of the <a title="valid service type"
-                  href="#dfn-valid-service-type"
-                  class="internalDFN">requested type tokens</a> gracefully leaves or expires from the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-available"><code>available</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a href="#dfn-current-service"
-                  class="internalDFN">current service</a> renews its service registration within the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-unavailable"><code>unavailable</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a href="#dfn-current-service"
-                  class="internalDFN">current service</a> gracefully leaves or otherwise expires from the current
-                  network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-notify"><code>notify</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a valid UPnP Events Subscription Message is received on a <a href=
-              "#dfn-user-agent-generated-callback-url"
-                  class="internalDFN">user-agent generated callback url</a> for a <a href="#dfn-current-service"
-                  class="internalDFN">current service</a>. This event never fires for Zeroconf-based services.
-            </td>
-          </tr>
-        </tbody>
-      </table>
-    </section>
-    <section id="garbage-collection">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_garbage-collection">
-        <span class="secno">10.</span> Garbage collection
-      </h2>
-      <p>
-        There is an <dfn id="dfn-implied-strong-reference">implied strong reference</dfn> from any IDL attribute in
-        this <abbr title="Application Programming Interface">API</abbr> that returns a pre-existing object to that
-        object.
-      </p>
-      <div class="note">
-        <div class="note-title"
-             aria-level="2"
-             role="heading"
-             id="h_note_3">
-          <span>Note</span>
-        </div>
-        <p class="">
-          For example, if a <a href="#networkservices"
-             class="internalDFN"><code>NetworkServices</code></a> object has one or more <a href=
-             "#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a> attached to it then there is a strong reference from that
-             <a href="#networkservices"
-             class="internalDFN"><code>NetworkServices</code></a> object toward each of its <a href=
-             "#dfn-indexed-properties"
-             class="internalDFN">indexed properties</a>.
-        </p>
-      </div>
-      <p>
-        If a <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> is to <dfn id="dfn-make-disappear">make disappear</dfn> a <a href=
-           "#networkservices"
-           class="internalDFN"><code>NetworkServices</code></a> object (this happens when a <a href=
-           "http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#document"
-           class="externalDFN"><code>Document</code></a> object goes away), the <a href="#dfn-user-agent"
-           class="internalDFN">user agent</a> <em class="rfc2119"
-           title="MUST">MUST</em> remove this object from the <a href="#dfn-list-of-active-service-managers"
-           class="internalDFN">list of active service managers</a>.
-      </p>
-    </section>
-    <section id="use-cases-and-requirements">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_use-cases-and-requirements">
-        <span class="secno">11.</span> Use Cases and Requirements
-      </h2>
-      <p>
-        This section covers what the requirements are for this <abbr title=
-        "Application Programming Interface">API</abbr>, as well as illustrates some use cases.
-      </p>
-      <ul class="rule">
-        <li>Once a user has given permission, user agents should provide the ability for Web pages to communicate
-        directly with a Local-networked Service.
-          <ul class="rule">
-            <li>Example: A web-based TV remote control. A Web page wants to control the current user's TV, changing the
-            programming shown or increasing/decreasing/muting the volume of the Local-networked Device. The Web page
-            requests a service type that is known to be implemented by television sets to which it has the application
-            logic to communicate. Local devices providing the request service types are discovered and presented to the
-            user for authorization. The user selects one or more of the discovered television sets to be accessible to
-            the current Web page and then clicks 'Share'. The Web page can now communicate directly with the
-            user-authorized Local-networked services.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should be able to communicate with Local-networked Services using the messaging channel supported
-        by those Devices.
-          <ul class="rule">
-            <li>Example: A Web page advertises that it is capable of controlling multiple Home Media Servers. The user
-            can select their Home Media Server type from a drop-down list, at which point the Web page sends a request
-            to the user agent to connect with the associated service type of the Home Media Server. The Media Server
-            selected implements a Web Socket channel for bi-directional service communication and so the Web page opens
-            a web socket to the requested Media Server and can communicate as required via that appropriate channel.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should be able to communicate with Local-networked Services using the messaging format supported
-        by those Devices.
-          <ul class="rule">
-            <li>Example: A Web page advertises that it is capable of interacting with and controlling multiple types of
-            Home Media Server. The user can select their Home Media Server type from a drop-down list or known Media
-            Servers, at which point the Web page sends a request to the user agent to connect with the associated
-            service type (and, optionally, the associated event type) of the Home Media Server. The communication
-            protocols supported by Home Media Servers typically vary between UPnP, JSON-RPC, Protocol Buffers or other
-            messaging formats depending on the Home Media Server requested. The Web page is able to communicate with
-            the user-selected Home Media Server in the messaging format supported by that Device, which, in this
-            example is a simple key/value pair text format.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should not be able to communicate with Local-networked Services that have not been authorized by
-        the user thereby maintaining the user's privacy.
-          <ul class="rule">
-            <li>Example: A Web page requests access to one type of Local-networked service. The user authorizes access
-            to that particular service. Other services running on that same device, and on other devices within the
-            network, should not be accessible to the current Web page.
-            </li>
-          </ul>
-        </li>
-        <li>A user should be able to share one or more Local-networked Services based on a particular service type
-        request from a Web page.
-          <ul class="rule">
-            <li>Example: A Web page is capable of interacting with a specific profile of Local-networked Service. As
-            such, it makes a request to the user agent to access those services, of which multiple matches are found.
-            The user is capable of selecting one or more of the discovered services to share with the Web page. The Web
-            page can then implement a drag-and-drop interface for the user to drag specific actions on to one or more
-            of the authorized Local-networked Services.
-            </li>
-          </ul>
-        </li>
-        <li>User agents should provide an <abbr title="Application Programming Interface">API</abbr> exposed to script
-        that exposes the features above. The user is notified by UI anytime interaction with Local-networked Services
-        is requested, giving the user full ability to cancel or abort the transaction. The user selects the
-        Local-networked Services to be connected to the current Web page, and can cancel these at any time. No
-        invocations to these APIs occur silently without user intervention.
-        </li>
-      </ul>
-    </section>
-    <section class="informative appendix"
-             id="examples">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_examples">
-        <span class="secno">A.</span> Examples
-      </h2>
-      <p>
-        <em>This section is non-normative.</em>
-      </p>
-      <div class="example">
-        <p>
-          This sample code exposes a button. When clicked, this button is disabled and the user is prompted to offer a
-          network service. The user may also select multiple network services. When the user has authorized a network
-          service to be connected to the web page then the web page issues a simple command to get a list of all the
-          albums stored on the connected media player service.
-        </p>
-        <p>
-          The button is re-enabled only when the connected network service disconnects for whatever reason (the service
-          becomes unavailable on the network, the user disconnects from their current network or the user revokes
-          access to the service from the current web page). At this point the user can re-click the button to select a
-          new network service to connect to the web page and the above steps are repeated.
-        </p>
-        <p>
-          The provided service type identifier and service interaction used in this example is based on the
-          well-defined service type and messaging format supported by the <a href="http://xbmc.org/about/">XBMC Media
-          Server</a>.
-        </p>
-        <hr>
-        <pre class="highlight prettyprint prettyprinted"
-             style="">
-<span class="tag">&lt;input</span><span class="pln"> </span><span class="atn">type</span><span class=
-"pun">=</span><span class="atv">"button"</span><span class="pln"> </span><span class="atn">value</span><span class=
-"pun">=</span><span class="atv">"Start"</span><span class="pln"> </span><span class="atn">onclick</span><span class=
-"pun">=</span><span class="atv">"</span><span class="pln">start</span><span class="pun">()</span><span class=
-"atv">"</span><span class="pln"> </span><span class="atn">id</span><span class="pun">=</span><span class=
-"atv">"startBtn"</span><span class="tag">/&gt;</span><span class="pln">
-</span><span class="tag">&lt;div</span><span class="pln"> </span><span class="atn">id</span><span class=
-"pun">=</span><span class="atv">"debugconsole"</span><span class="tag">&gt;&lt;/div&gt;</span><span class="pln">
-
-</span><span class="tag">&lt;script&gt;</span><span class="pln">
- </span><span class="kwd">var</span><span class="pln"> startBtn </span><span class="pun">=</span><span class=
-"pln"> document</span><span class="pun">.</span><span class="pln">getElementById</span><span class=
-"pun">(</span><span class="str">'startBtn'</span><span class="pun">),</span><span class="pln">
-     debug </span><span class="pun">=</span><span class="pln"> document</span><span class="pun">.</span><span class=
-"pln">getElementById</span><span class="pun">(</span><span class="str">'debugconsole'</span><span class=
-"pun">);</span><span class="pln">
-
- </span><span class="kwd">function</span><span class="pln"> start</span><span class="pun">()</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-   </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">navigator</span><span class=
-"pun">.</span><span class="pln">getNetworkServices</span><span class="pun">)</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-      navigator</span><span class="pun">.</span><span class="pln">getNetworkServices</span><span class=
-"pun">(</span><span class="str">'zeroconf:_xbmc-jsonrpc._tcp'</span><span class="pun">).</span><span class=
-"pln">then</span><span class="pun">(</span><span class="pln">gotXBMCService</span><span class=
-"pun">).</span><span class="kwd">catch</span><span class="pun">(</span><span class="pln">error</span><span class=
-"pun">);</span><span class="pln">
-      startBtn</span><span class="pun">.</span><span class="pln">disabled </span><span class="pun">=</span><span class=
-"pln"> </span><span class="kwd">true</span><span class="pun">;</span><span class="pln">
-   </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">else</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-      debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;Service Discovery not supported!"</span><span class=
-"pun">;</span><span class="pln">
-   </span><span class="pun">}</span><span class="pln">
- </span><span class="pun">}</span><span class="pln">
-
- </span><span class="kwd">function</span><span class="pln"> gotXBMCService</span><span class="pun">(</span><span class=
-"pln">services</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-
-</span><span class="com">// Listen for service disconnect messages</span><span class="pln">
-
-   services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">addEventListener</span><span class="pun">(</span><span class="str">'unavailable'</span><span class=
-"pun">,</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> </span><span class=
-"pun">(</span><span class="pln"> e </span><span class="pun">)</span><span class="pln"> </span><span class=
-"pun">{</span><span class="pln">
-       debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class="pun">+</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" disconnected."</span><span class="pun">;</span><span class="pln">
-       startBtn</span><span class="pun">.</span><span class="pln">disabled </span><span class=
-"pun">=</span><span class="pln"> </span><span class="kwd">false</span><span class="pun">;</span><span class="pln">
-   </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">false</span><span class=
-"pun">);</span><span class="pln">
-
-</span><span class=
-"com">// Send a service message to get albums list (and process the service response)</span><span class="pln">
-
-   </span><span class="kwd">var</span><span class="pln"> svcXhr </span><span class="pun">=</span><span class=
-"pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">XMLHttpRequest</span><span class=
-"pun">();</span><span class="pln">
-   svcXhr</span><span class="pun">.</span><span class="pln">open</span><span class="pun">(</span><span class=
-"str">"POST"</span><span class="pun">,</span><span class="pln"> services</span><span class="pun">[</span><span class=
-"lit">0</span><span class="pun">].</span><span class="pln">url </span><span class="pun">+</span><span class=
-"pln"> </span><span class="str">"/getAlbums"</span><span class="pun">);</span><span class="pln"> </span><span class=
-"com">// services[0].url and its sub-resources are</span><span class="pln">
-                                                        </span><span class=
-"com">// available for cross-site XHR use.</span><span class="pln">
-
-   svcXhr</span><span class="pun">.</span><span class="pln">setRequestHeader</span><span class=
-"pun">(</span><span class="str">'Content-Type'</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">'application/json-rpc'</span><span class="pun">);</span><span class="pln">
-
-   svcXhr</span><span class="pun">.</span><span class="pln">addEventListener</span><span class=
-"pun">(</span><span class="str">'readystatechange'</span><span class="pun">,</span><span class=
-"pln"> </span><span class="kwd">function</span><span class="pln"> </span><span class="pun">(</span><span class=
-"pln"> response </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-     </span><span class="kwd">if</span><span class="pun">(</span><span class="pln"> response</span><span class=
-"pun">.</span><span class="pln">readyState </span><span class="pun">!=</span><span class="pln"> </span><span class=
-"lit">4</span><span class="pln"> </span><span class="pun">||</span><span class="pln"> response</span><span class=
-"pun">.</span><span class="pln">status </span><span class="pun">!=</span><span class="pln"> </span><span class=
-"lit">200</span><span class="pln"> </span><span class="pun">)</span><span class="pln">
-        </span><span class="kwd">return</span><span class="pun">;</span><span class="pln">
-     debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class="pun">+</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" response received: "</span><span class="pun">;</span><span class="pln">
-     debug</span><span class="pun">.</span><span class="pln">textContent </span><span class="pun">+=</span><span class=
-"pln"> JSON</span><span class="pun">.</span><span class="pln">parse</span><span class="pun">(</span><span class=
-"pln">response</span><span class="pun">.</span><span class="pln">responseText</span><span class=
-"pun">);</span><span class="pln">
-   </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">false</span><span class=
-"pun">);</span><span class="pln">
-
-   </span><span class="kwd">var</span><span class="pln"> svcMsg </span><span class="pun">=</span><span class=
-"pln"> </span><span class="pun">[</span><span class="pln">
-     </span><span class="pun">{</span><span class="pln"> </span><span class="str">"jsonrpc"</span><span class=
-"pun">:</span><span class="pln"> </span><span class="str">"2.0"</span><span class="pun">,</span><span class=
-"pln"> </span><span class="str">"method"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"str">"AudioLibrary.GetAlbums"</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"params"</span><span class="pun">:</span><span class="pln"> </span><span class="pun">{</span><span class=
-"pln"> </span><span class="str">"genreid"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"pun">-</span><span class="lit">1</span><span class="pun">,</span><span class="pln">
-         </span><span class="str">"artistid"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"pun">-</span><span class="lit">1</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"start"</span><span class="pun">:</span><span class="pln"> </span><span class="pun">-</span><span class=
-"lit">1</span><span class="pun">,</span><span class="pln"> </span><span class="str">"end"</span><span class=
-"pun">:</span><span class="pln"> </span><span class="pun">-</span><span class="lit">1</span><span class=
-"pln"> </span><span class="pun">},</span><span class="pln"> </span><span class="str">"id"</span><span class=
-"pun">:</span><span class="pln"> </span><span class="str">"1"</span><span class="pln"> </span><span class=
-"pun">}</span><span class="pln">
-   </span><span class="pun">];</span><span class="pln">
-
-   svcXhr</span><span class="pun">.</span><span class="pln">send</span><span class="pun">(</span><span class=
-"pln">JSON</span><span class="pun">.</span><span class="pln">stringify</span><span class="pun">(</span><span class=
-"pln">svcMsg</span><span class="pun">));</span><span class="pln">
-   debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class="pun">+</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" request sent: "</span><span class="pun">;</span><span class="pln">
-   debug</span><span class="pun">.</span><span class="pln">textContent </span><span class="pun">+=</span><span class=
-"pln"> JSON</span><span class="pun">.</span><span class="pln">stringify</span><span class="pun">(</span><span class=
-"pln">svcMsg</span><span class="pun">);</span><span class="pln">
-
- </span><span class="pun">}</span><span class="pln">
-
- </span><span class="kwd">function</span><span class="pln"> error</span><span class="pun">(</span><span class=
-"pln"> err </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-   debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;An error occurred obtaining a local network service."</span><span class=
-"pun">;</span><span class="pln">
-   startBtn</span><span class="pun">.</span><span class="pln">disabled </span><span class="pun">=</span><span class=
-"pln"> </span><span class="kwd">false</span><span class="pun">;</span><span class="pln">
- </span><span class="pun">}</span><span class="pln">
-</span><span class="tag">&lt;/script&gt;</span>
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          This sample exposes a drop-down list containing a number of common Home-based audio devices. When the user
-          selects an audio device from the list provided, they are prompted to authorize a network service based on the
-          service type requested. The user may also select multiple network services matching the selected service
-          type. In this example, the user selects their make as being <var>Sony</var> and their model as being
-          <var>Bravia S1000</var> from which the Web page can derive a service type
-          (<var>urn:schemas-upnp-org:service:RenderingControl:1</var>).<br>
-          <br>
-          Once the user has authorized the device, the web page sends a simple mute command according to the messaging
-          format supported by the device.
-        </p>
-        <hr>
-        <pre class="highlight prettyprint prettyprinted"
-             style="">
-<span class="tag">&lt;select</span><span class="pln"> </span><span class="atn">name</span><span class=
-"pun">=</span><span class="atv">"make"</span><span class="pln"> </span><span class="atn">id</span><span class=
-"pun">=</span><span class="atv">"make"</span><span class="tag">&gt;</span><span class="pln">
-  </span><span class="tag">&lt;option</span><span class="pln"> </span><span class="atn">selected</span><span class=
-"pun">=</span><span class="atv">"selected"</span><span class="pln"> </span><span class=
-"atn">disabled</span><span class="pun">=</span><span class="atv">"disabled"</span><span class=
-"tag">&gt;</span><span class="pln">Select make</span><span class="tag">&lt;/option&gt;</span><span class="pln">
-  </span><span class="tag">&lt;option&gt;</span><span class="pln">Sony</span><span class=
-"tag">&lt;/option&gt;</span><span class="pln">
-  </span><span class="tag">&lt;option&gt;</span><span class="pln">Philips</span><span class=
-"tag">&lt;/option&gt;</span><span class="pln">
-  </span><span class="tag">&lt;option&gt;</span><span class="pln">Alba</span><span class=
-"tag">&lt;/option&gt;</span><span class="pln">
-</span><span class="tag">&lt;/select&gt;</span><span class="pln">
-</span><span class="tag">&lt;select</span><span class="pln"> </span><span class="atn">name</span><span class=
-"pun">=</span><span class="atv">"model"</span><span class="pln"> </span><span class="atn">id</span><span class=
-"pun">=</span><span class="atv">"model"</span><span class="tag">&gt;&lt;/select&gt;</span><span class="pln">
-</span><span class="tag">&lt;div</span><span class="pln"> </span><span class="atn">id</span><span class=
-"pun">=</span><span class="atv">"debugconsole"</span><span class="tag">&gt;&lt;/div&gt;</span><span class="pln">
-
-</span><span class="tag">&lt;script&gt;</span><span class="pln">
-  </span><span class="kwd">var</span><span class="pln"> debug </span><span class="pun">=</span><span class=
-"pln"> document</span><span class="pun">.</span><span class="pln">getElementById</span><span class=
-"pun">(</span><span class="str">'debugconsole'</span><span class="pun">);</span><span class="pln">
-
-  </span><span class="kwd">var</span><span class="pln"> models </span><span class="pun">=</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-    </span><span class="str">"Sony"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"pun">[</span><span class="pln">
-      </span><span class="pun">{</span><span class="str">"name"</span><span class="pun">:</span><span class=
-"pln"> </span><span class="str">"Bravia TV S1000"</span><span class="pun">,</span><span class=
-"pln"> </span><span class="str">"type"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"str">"upnp"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"service"</span><span class=
-"pun">:</span><span class="pln"> </span><span class=
-"str">"urn:schemas-upnp-org:service:RenderingControl:1"</span><span class="pln"> </span><span class=
-"pun">},</span><span class="pln">
-      </span><span class="pun">{</span><span class="str">"name"</span><span class="pun">:</span><span class=
-"pln"> </span><span class="str">"Bravia TV S2000"</span><span class="pun">,</span><span class=
-"pln"> </span><span class="str">"type"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"str">"zeroconf"</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"service"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"str">"_mediarenderer._http._tcp"</span><span class="pln"> </span><span class="pun">},</span><span class="pln">
-      </span><span class="pun">{</span><span class="str">"name"</span><span class="pun">:</span><span class=
-"pln"> </span><span class="str">"HiFi WD10"</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"type"</span><span class="pun">:</span><span class="pln"> </span><span class="str">"upnp"</span><span class=
-"pun">,</span><span class="pln"> </span><span class="str">"service"</span><span class="pun">:</span><span class=
-"pln"> </span><span class="str">"urn:schemas-upnp-org:service:RenderingControl:1"</span><span class=
-"pln"> </span><span class="pun">}</span><span class="pln">
-    </span><span class="pun">],</span><span class="pln">
-    </span><span class="str">"Philips"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"pun">[</span><span class="pln"> </span><span class="com">/* ... */</span><span class="pln"> </span><span class=
-"pun">],</span><span class="pln">
-    </span><span class="str">"Alba"</span><span class="pun">:</span><span class="pln"> </span><span class=
-"pun">[</span><span class="pln"> </span><span class="com">/* ... */</span><span class="pln"> </span><span class=
-"pun">]</span><span class="pln">
-  </span><span class="pun">};</span><span class="pln">
-
-  </span><span class="kwd">var</span><span class="pln"> makeEl </span><span class="pun">=</span><span class=
-"pln"> document</span><span class="pun">.</span><span class="pln">getElementById</span><span class=
-"pun">(</span><span class="str">"make"</span><span class="pun">),</span><span class="pln">
-      modelEl </span><span class="pun">=</span><span class="pln"> document</span><span class="pun">.</span><span class=
-"pln">getElementById</span><span class="pun">(</span><span class="str">"model"</span><span class=
-"pun">);</span><span class="pln">
-
-  makeEl</span><span class="pun">.</span><span class="pln">addEventListener</span><span class=
-"pun">(</span><span class="str">'change'</span><span class="pun">,</span><span class="pln"> </span><span class=
-"kwd">function</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-    modelEl</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">=</span><span class=
-"pln"> </span><span class="str">""</span><span class="pun">;</span><span class="pln"> </span><span class=
-"com">// reset</span><span class="pln">
-    </span><span class="kwd">var</span><span class="pln"> defaultOption </span><span class="pun">=</span><span class=
-"pln"> document</span><span class="pun">.</span><span class="pln">createElement</span><span class=
-"pun">(</span><span class="str">"option"</span><span class="pun">);</span><span class="pln">
-    defaultOption</span><span class="pun">.</span><span class="pln">textContent </span><span class=
-"pun">=</span><span class="pln"> </span><span class="str">"Select model"</span><span class="pun">;</span><span class=
-"pln">
-    defaultOption</span><span class="pun">.</span><span class="pln">setAttribute</span><span class=
-"pun">(</span><span class="str">"disabled"</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"disabled"</span><span class="pun">);</span><span class="pln">
-    defaultOption</span><span class="pun">.</span><span class="pln">setAttribute</span><span class=
-"pun">(</span><span class="str">"selected"</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">"selected"</span><span class="pun">);</span><span class="pln">
-    modelEl</span><span class="pun">.</span><span class="pln">appendChild</span><span class="pun">(</span><span class=
-"pln">defaultOption</span><span class="pun">);</span><span class="pln">
-    </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">var</span><span class=
-"pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class=
-"pun">,</span><span class="pln"> l </span><span class="pun">=</span><span class="pln"> models</span><span class=
-"pun">[</span><span class="pln">makeEl</span><span class="pun">.</span><span class="pln">value</span><span class=
-"pun">].</span><span class="pln">length</span><span class="pun">;</span><span class="pln"> i </span><span class=
-"pun">&lt;</span><span class="pln"> l</span><span class="pun">;</span><span class="pln"> i</span><span class=
-"pun">++)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-      </span><span class="kwd">var</span><span class="pln"> option </span><span class="pun">=</span><span class=
-"pln"> document</span><span class="pun">.</span><span class="pln">createElement</span><span class=
-"pun">(</span><span class="str">"option"</span><span class="pun">);</span><span class="pln">
-      option</span><span class="pun">.</span><span class="pln">textContent </span><span class=
-"pun">=</span><span class="pln"> models</span><span class="pun">[</span><span class="pln">makeEl</span><span class=
-"pun">.</span><span class="pln">value</span><span class="pun">][</span><span class="pln">i</span><span class=
-"pun">][</span><span class="str">"name"</span><span class="pun">];</span><span class="pln">
-      option</span><span class="pun">.</span><span class="pln">setAttribute</span><span class=
-"pun">(</span><span class="str">"value"</span><span class="pun">,</span><span class="pln"> models</span><span class=
-"pun">[</span><span class="pln">makeEl</span><span class="pun">.</span><span class="pln">value</span><span class=
-"pun">][</span><span class="pln">i</span><span class="pun">][</span><span class="str">"type"</span><span class=
-"pun">]</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">":"</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> models</span><span class=
-"pun">[</span><span class="pln">makeEl</span><span class="pun">.</span><span class="pln">value</span><span class=
-"pun">][</span><span class="pln">i</span><span class="pun">][</span><span class="str">"service"</span><span class=
-"pun">]);</span><span class="pln">
-      modelEl</span><span class="pun">.</span><span class="pln">appendChild</span><span class=
-"pun">(</span><span class="pln">option</span><span class="pun">);</span><span class="pln">
-    </span><span class="pun">}</span><span class="pln">
-  </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">false</span><span class=
-"pun">);</span><span class="pln">
-
-  modelEl</span><span class="pun">.</span><span class="pln">addEventListener</span><span class=
-"pun">(</span><span class="str">'change'</span><span class="pun">,</span><span class="pln"> </span><span class=
-"kwd">function</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-    </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">navigator</span><span class=
-"pun">.</span><span class="pln">getNetworkServices </span><span class="pun">&amp;&amp;</span><span class="pln">
-         modelEl</span><span class="pun">.</span><span class="pln">value </span><span class="pun">==</span><span class=
-"pln"> </span><span class="str">"upnp:urn:schemas-upnp-org:service:RenderingControl:1"</span><span class=
-"pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-      </span><span class="kwd">var</span><span class="pln"> servicesPromise </span><span class=
-"pun">=</span><span class="pln"> navigator</span><span class="pun">.</span><span class=
-"pln">getNetworkServices</span><span class="pun">(</span><span class="pln">modelEl</span><span class=
-"pun">.</span><span class="pln">value</span><span class="pun">).</span><span class="pln">then</span><span class=
-"pun">(</span><span class="pln">successCallback</span><span class="pun">,</span><span class=
-"pln"> errorCallback</span><span class="pun">);</span><span class="pln">
-    </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">else</span><span class=
-"pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class=
-"pln">modelEl</span><span class="pun">.</span><span class="pln">value </span><span class="pun">==</span><span class=
-"pln"> </span><span class="str">"zeroconf:_mediarenderer._http._tcp"</span><span class="pun">)</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-      debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;Service type is not implemented by this application."</span><span class=
-"pun">;</span><span class="pln">
-    </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">else</span><span class=
-"pln"> </span><span class="pun">{</span><span class="pln">
-      debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;Service Discovery is not supported!"</span><span class=
-"pun">;</span><span class="pln">
-    </span><span class="pun">}</span><span class="pln">
-  </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">false</span><span class=
-"pun">);</span><span class="pln">
-</span><span class="tag">&lt;/script&gt;</span><span class="pln">
-
-</span><span class="tag">&lt;script&gt;</span><span class="pln">
-  </span><span class="kwd">function</span><span class="pln"> successCallback</span><span class=
-"pun">(</span><span class="pln"> services </span><span class="pun">)</span><span class="pln"> </span><span class=
-"pun">{</span><span class="pln">
-
-  </span><span class="com">// Listen for service push notification messages</span><span class="pln">
-
-    services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">addEventListener</span><span class="pun">(</span><span class="str">'notify'</span><span class=
-"pun">,</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> </span><span class=
-"pun">(</span><span class="pln"> msg </span><span class="pun">)</span><span class="pln"> </span><span class=
-"pun">{</span><span class="pln">
-         debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class=
-"pun">+=</span><span class="pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class=
-"pun">].</span><span class="pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" event received: "</span><span class="pun">;</span><span class="pln">
-         debug</span><span class="pun">.</span><span class="pln">textContent </span><span class=
-"pun">+=</span><span class="pln"> msg</span><span class="pun">.</span><span class="pln">data</span><span class=
-"pun">;</span><span class="pln">
-    </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">false</span><span class=
-"pun">);</span><span class="pln">
-
- </span><span class="com">// Send a control signal to mute the service audio</span><span class="pln">
-
-    </span><span class="kwd">var</span><span class="pln"> svcXhr </span><span class="pun">=</span><span class=
-"pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">XMLHttpRequest</span><span class=
-"pun">();</span><span class="pln">
-    svcXhr</span><span class="pun">.</span><span class="pln">open</span><span class="pun">(</span><span class=
-"str">"POST"</span><span class="pun">,</span><span class="pln"> services</span><span class="pun">[</span><span class=
-"lit">0</span><span class="pun">].</span><span class="pln">url</span><span class="pun">);</span><span class=
-"pln"> </span><span class="com">// services[0].url and its sub-resources are</span><span class="pln">
-                                          </span><span class=
-"com">// available for cross-site XHR use.</span><span class="pln">
-
-    svcXhr</span><span class="pun">.</span><span class="pln">setRequestHeader</span><span class=
-"pun">(</span><span class="str">'SOAPAction'</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">'urn:schemas-upnp-org:service:RenderingControl:1#SetMute'</span><span class="pun">);</span><span class="pln">
-    svcXhr</span><span class="pun">.</span><span class="pln">setRequestHeader</span><span class=
-"pun">(</span><span class="str">'Content-Type'</span><span class="pun">,</span><span class="pln"> </span><span class=
-"str">'text/xml; charset="utf-8";'</span><span class="pun">);</span><span class="pln">
-
-    svcXhr</span><span class="pun">.</span><span class="pln">onreadystatechange </span><span class=
-"pun">=</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> </span><span class=
-"pun">(</span><span class="pln"> response </span><span class="pun">)</span><span class="pln"> </span><span class=
-"pun">{</span><span class="pln">
-      </span><span class="kwd">if</span><span class="pun">(</span><span class="pln"> response</span><span class=
-"pun">.</span><span class="pln">readyState </span><span class="pun">!=</span><span class="pln"> </span><span class=
-"lit">4</span><span class="pln"> </span><span class="pun">||</span><span class="pln"> response</span><span class=
-"pun">.</span><span class="pln">status </span><span class="pun">!=</span><span class="pln"> </span><span class=
-"lit">200</span><span class="pln"> </span><span class="pun">)</span><span class="pln">
-        </span><span class="kwd">return</span><span class="pun">;</span><span class="pln">
-      debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class="pun">+</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" response received: "</span><span class="pun">;</span><span class="pln">
-      debug</span><span class="pun">.</span><span class="pln">textContent </span><span class=
-"pun">+=</span><span class="pln"> response</span><span class="pun">.</span><span class=
-"pln">responseXML</span><span class="pun">;</span><span class="pln">
-    </span><span class="pun">}</span><span class="pln">
-
-    </span><span class="com">// Service messaging to mute the provided service</span><span class="pln">
-    </span><span class="kwd">var</span><span class="pln"> svcMsg </span><span class="pun">=</span><span class=
-"pln"> </span><span class="str">'&lt;?xml version="1.0" encoding="utf-8"?&gt;'</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                 </span><span class=
-"str">'&lt;s:Envelope s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" '</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                   </span><span class=
-"str">'xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;'</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln">
-                   </span><span class="str">'&lt;s:Body&gt;'</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln">
-                     </span><span class=
-"str">'&lt;u:SetMute xmlns:u="urn:schemas-upnp-org:service:RenderingControl:1"&gt;'</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                       </span><span class="str">'&lt;InstanceID&gt;0&lt;/InstanceID&gt;'</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                       </span><span class="str">'&lt;Channel&gt;Master&lt;/Channel&gt;'</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                       </span><span class="str">'&lt;DesiredMute&gt;true&lt;/DesiredMute&gt;'</span><span class=
-"pln"> </span><span class="pun">+</span><span class="pln">
-                     </span><span class="str">'&lt;/u:SetMute&gt;'</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln">
-                   </span><span class="str">'&lt;/s:Body&gt;'</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln">
-                 </span><span class="str">'&lt;/s:Envelope&gt;'</span><span class="pun">;</span><span class="pln">
-
-    svcXhr</span><span class="pun">.</span><span class="pln">send</span><span class="pun">(</span><span class=
-"pln">svcMsg</span><span class="pun">);</span><span class="pln">
-    debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;"</span><span class="pln"> </span><span class="pun">+</span><span class=
-"pln"> services</span><span class="pun">[</span><span class="lit">0</span><span class="pun">].</span><span class=
-"pln">name </span><span class="pun">+</span><span class="pln"> </span><span class=
-"str">" request sent: "</span><span class="pun">;</span><span class="pln">
-    debug</span><span class="pun">.</span><span class="pln">textContent </span><span class="pun">+=</span><span class=
-"pln"> svcMsg</span><span class="pun">;</span><span class="pln">
-  </span><span class="pun">}</span><span class="pln">
-
-  </span><span class="kwd">function</span><span class="pln"> errorCallback</span><span class="pun">(</span><span class=
-"pln"> error </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
-    debug</span><span class="pun">.</span><span class="pln">innerHTML </span><span class="pun">+=</span><span class=
-"pln"> </span><span class="str">"&lt;br&gt;An error occurred: "</span><span class="pln"> </span><span class=
-"pun">+</span><span class="pln"> error</span><span class="pun">.</span><span class="pln">name</span><span class=
-"pun">;</span><span class="pln">
-  </span><span class="pun">}</span><span class="pln">
-</span><span class="tag">&lt;/script&gt;</span>
-</pre>
-      </div>
-    </section>
-    <section id="acknowledgements">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_acknowledgements">
-        <span class="secno">B.</span> Acknowledgements
-      </h2>
-      <p>
-        Thanks are expressed by the editor to the following individuals for their feedback on this specification to
-        date (in alphabetical order):<br>
-        <br>
-        Adam Barth, Gar Bergstedt, Robin Berjon, Lars-Erik Bolstad, Marcos Caceres, Cathy Chan, Daniel Danciu,
-        Jean-Claude Dufourd, Youenn Fablot, Mark Foltz, Dominique Hazael-Massieux, Frederick Hirsch, Tatsuya Igarashi,
-        Hari G Kumar, Bob Lund, Giuseppe Pascale, Marcin Simonides, Clarke Stevens, Christian Söderström, Mark Vickers.
-      </p>
-      <p>
-        Thanks are also expressed by the editor to the following organizations and groups for their support in
-        producing this specification to date (in alphabetical order):<br>
-        <br>
-        CableLabs, Google Inc., Opera Software ASA, Nokia Corp., Télécom ParisTech, <abbr title=
-        "World Wide Web Consortium">W3C</abbr> Device APIs Working Group, <abbr title=
-        "World Wide Web Consortium">W3C</abbr> Web and TV Interest Group.
-      </p>
-    </section><style>
-a.externalDFN { color: #00C; border-bottom: 1px dashed #00C; }
-    a.internalDFN { color: #00C; text-decoration: solid; }
-    </style>
-    <section id="references"
-             class="appendix"
-             typeof="bibo:Chapter"
-             resource="#ref"
-             rel="bibo:Chapter">
-      <h2 aria-level="1"
-          role="heading"
-          id="h2_references">
-        <span class="secno">C.</span> References
-      </h2>
-      <section id="normative-references"
-               typeof="bibo:Chapter"
-               resource="#ref"
-               rel="bibo:Chapter">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_normative-references">
-          <span class="secno">C.1</span> Normative references
-        </h3>
-        <dl class="bibliography"
-            about="">
-          <dt id="bib-CORS">
-            [CORS]
-          </dt>
-          <dd rel="dcterms:requires">
-            Anne van Kesteren. <a href="http://www.w3.org/TR/cors/"><cite>Cross-Origin Resource Sharing</cite></a>. 16
-            January 2014. W3C Recommendation. URL: <a href="http://www.w3.org/TR/cors/">http://www.w3.org/TR/cors/</a>
-          </dd>
-          <dt id="bib-DNS-SD">
-            [DNS-SD]
-          </dt>
-          <dd rel="dcterms:requires">
-            S. Cheshire; M. Krochmal. <a href="http://www.ietf.org/rfc/rfc6763.txt"><cite>DNS-Based Service
-            Discovery</cite></a>. February 2013. RFC. URL: <a href=
-            "http://www.ietf.org/rfc/rfc6763.txt">http://www.ietf.org/rfc/rfc6763.txt</a>
-          </dd>
-          <dt id="bib-DOM4">
-            [DOM4]
-          </dt>
-          <dd rel="dcterms:requires">
-            Anne van Kesteren; Aryeh Gregor; Ms2ger; Alex Russell; Robin Berjon. <a href=
-            "http://www.w3.org/TR/dom/"><cite>W3C DOM4</cite></a>. 4 February 2014. W3C Last Call Working Draft. URL:
-            <a href="http://www.w3.org/TR/dom/">http://www.w3.org/TR/dom/</a>
-          </dd>
-          <dt id="bib-HTML5">
-            [HTML5]
-          </dt>
-          <dd rel="dcterms:requires">
-            Robin Berjon; Steve Faulkner; Travis Leithead; Erika Doyle Navara; Edward O'Connor; Silvia Pfeiffer.
-            <a href="http://www.w3.org/TR/html5/"><cite>HTML5</cite></a>. 4 February 2014. W3C Candidate
-            Recommendation. URL: <a href="http://www.w3.org/TR/html5/">http://www.w3.org/TR/html5/</a>
-          </dd>
-          <dt id="bib-MDNS">
-            [MDNS]
-          </dt>
-          <dd rel="dcterms:requires">
-            S. Cheshire; M. Krochmal. <a href="http://www.ietf.org/rfc/rfc6763.txt"><cite>Multicast DNS</cite></a>.
-            February 2013. RFC. URL: <a href=
-            "http://www.ietf.org/rfc/rfc6763.txt">http://www.ietf.org/rfc/rfc6763.txt</a>
-          </dd>
-          <dt id="bib-RFC2119">
-            [RFC2119]
-          </dt>
-          <dd rel="dcterms:requires">
-            S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate
-            Requirement Levels.</cite></a> March 1997. Internet RFC 2119. URL: <a href=
-            "http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
-          </dd>
-          <dt id="bib-UPNP-DEVICEARCH11">
-            [UPNP-DEVICEARCH11]
-          </dt>
-          <dd rel="dcterms:requires">
-            <a href="http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf"><cite>UPnP Device Architecture
-            1.1</cite></a>. 15 October 2008. UPnP Forum. PDF document. URL: <a href=
-            "http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf">http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf</a>
-          </dd>
-          <dt id="bib-WEBIDL">
-            [WEBIDL]
-          </dt>
-          <dd rel="dcterms:requires">
-            Cameron McCormack. <a href="http://www.w3.org/TR/WebIDL/"><cite>Web IDL</cite></a>. 19 April 2012. W3C
-            Candidate Recommendation. URL: <a href="http://www.w3.org/TR/WebIDL/">http://www.w3.org/TR/WebIDL/</a>
-          </dd>
-        </dl>
-      </section>
-      <section id="informative-references"
-               typeof="bibo:Chapter"
-               resource="#ref"
-               rel="bibo:Chapter">
-        <h3 aria-level="2"
-            role="heading"
-            id="h3_informative-references">
-          <span class="secno">C.2</span> Informative references
-        </h3>
-        <dl class="bibliography"
-            about="">
-          <dt id="bib-hnreq">
-            [hnreq]
-          </dt>
-          <dd rel="dcterms:references">
-            Giuseppe Pascale. <a href="http://www.w3.org/TR/hnreq/"><cite>Requirements for Home Networking
-            Scenarios</cite></a>. 1 December 2011. W3C Note. URL: <a href=
-            "http://www.w3.org/TR/hnreq/">http://www.w3.org/TR/hnreq/</a>
-          </dd>
-        </dl>
-      </section>
-    </section>
-  </body>
-</html>
+  </style>
+  <script src="https://www.w3.org/scripts/TR/2016/fixup.js"></script>
+</body>
+</html>
\ No newline at end of file
diff -r 794817a23d8e -r ffb713303c21 discovery-api/Overview.src.html
--- a/discovery-api/Overview.src.html	Thu Mar 17 16:00:35 2016 +0200
+++ b/discovery-api/Overview.src.html	Wed Jan 11 10:30:32 2017 +0100
@@ -38,8 +38,8 @@
           //publishDate:  "2013-09-05",
           shortName:    "discovery-api",
           edDraftURI:   "http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html",
-          previousMaturity: "FPWD",
-          previousPublishDate: "2013-04-04",
+          previousMaturity: "WD",
+          previousPublishDate: "2014-02-20",
           editors: [
             {
               name:       "Rich Tibbett",
@@ -49,10 +49,10 @@
             }
           ],
 
-          wg:           "Device APIs Working Group",
-          wgURI:        "http://www.w3.org/2009/dap/",
+          wg:           "Device and Sensors Working Group",
+          wgURI:        "https://www.w3.org/2009/dap/",
           wgPublicList: "public-device-apis",
-          wgPatentURI:  "http://www.w3.org/2004/01/pp-impl/43696/status",
+          wgPatentURI:  "https://www.w3.org/2004/01/pp-impl/43696/status",
 
     //          extraCSS:     ["http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/css/respec.nsd.css"],
     //          inlineCSS:    true,
@@ -115,2043 +115,7 @@
     </section>
     <section id='sotd'>
       <p>
-        This document represents the early consensus of the group on the scope and features of the proposed API.
-      </p>
-    </section>
-    <section class="informative">
-      <h3>
-        Introduction
-      </h3>
-      <p>
-        This specification defines the <a href="#navigatornetworkservice"><code>NavigatorNetworkService</code></a>
-        interface to enable Web pages to connect and communicate with Local-networked Services provided over HTTP. This
-        enables access to services and content provided by home network devices, including the discovery and playback
-        of content available to those devices, both from services such as traditional broadcast media and internet
-        based services as well as local services. Initial design goals and requirements provided by the <a href=
-        "http://www.w3.org/2011/webtv/">W3C Web &amp; TV interest group</a> are documented in [[hnreq]].
-      </p>
-      <p>
-        Using this <abbr title="Application Programming Interface">API</abbr> consists of requesting a well-known
-        service type, known by developers and advertised by Local-networked Devices. User authorization, where the user
-        connects the web page to discovered services, is expected before the web page is able to interact with any
-        Local-networked Services.
-      </p>
-      <p>
-        A web page creates a request to obtain connectivity to services running in the network by specifying a
-        well-known discovery service type that it wishes to interact with.
-      </p>
-      <p>
-        The user agent, having captured all advertised services on the network from the <a>service discovery
-        mechanisms</a> included in this recommendation, attempts to match the requested service type to a discovered
-        service according to the processing described herein. Only Local-networked Services that pass a <a>preliminary
-        CORS check</a> should be made available to web pages by a user agent. A user agent may provide a way for users
-        to white-list non-CORS enabled Local-networked Services but implementation of such a feature is left to the
-        discretion of the implementer.
-      </p>
-      <p>
-        If a service connectivity request is successful then the Web page is provided with a promise-based success
-        callback with the all necessary information to communicate with the authorized Local-networked Service. If the
-        request fails then the Web page will receive a promise-based error callback containing an error string
-        describing the cause of Local-networked Service connectivity failure.
-      </p>
-      <p>
-        Once connected to a Local-networked Service the Web page can send requests and receive responses to the
-        Local-networked Service via the messaging format and appropriate channel inferred from the service type
-        authorized via the provided API. The Web page, once connected, can also receive service-pushed events, in the
-        messaging format supported by the Local-networked Device, if such event subscription functionality is provided
-        by the connected Local-networked Service.
-      </p>
-      <p>
-        Services available within the local network can connect and disconnect at different times during the execution
-        of a web page. The user agent can inform a web page when the state of networked services matching any of the
-        requested valid service types change. Web pages can use this information to enable in-page experiences for
-        communicating the state of networked services with the ability to change the particular service or set of
-        services the page is connected to (by re-invoking the <a href=
-        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method defined herein).
-      </p>
-      <div class="example">
-        <p>
-          Example of requesting a DNS-SD advertised service:
-        </p>
-        <hr>
-        <pre class="highlight">
-function showServices( services ) {
-  // Show a list of all the services provided to the web page
-  for(var i = 0, l = services.length; i &lt; l; i++) console.log( services[i].name );
-}
-
-navigator.getNetworkServices('zeroconf:_boxee-jsonrpc._tcp').then(showServices);
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          Example of requesting a UPnP advertised service, also handling error conditions:
-        </p>
-        <hr>
-        <pre class="highlight">
-function showServices( services ) {
-  // Show a list of all the services provided to the web page
-  for(var i = 0, l = services.length; i &lt; l; i++) console.log( services[i].name );
-}
-
-function error( e ) {
-  console.log( "Error occurred: " + e.name );
-}
-
-navigator.getNetworkServices('upnp:urn:schemas-upnp-org:service:ContentDirectory:1').then(showServices, error);
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          Example of requesting either a DNS-SD or UPnP advertised service:
-        </p>
-        <hr>
-        <pre class="highlight">
-function showServices( services ) {
-  // Show a list of all the services provided to the web page (+ service type)
-  for(var i = 0, l = services.length; i &lt; l; i++)
-     console.log( services[i].name + '(' + services[i].type + ')' );
-}
-
-navigator.getNetworkServices([
-  'zeroconf:_boxee-jsonrpc._tcp',
-  'upnp:urn:schemas-upnp-org:service:ContentDirectory:1'
-]).then(showServices);
-</pre>
-      </div>
-      <p>
-        For more detailed examples, including examples of communicating with obtained networked services, see the
-        <a href="#examples">Examples</a> section.
-      </p>
-    </section>
-    <section id='conformance'>
-      <p>
-        Requirements phrased in the imperative as part of algorithms (such as "strip any leading space characters" or
-        "return false and abort these steps") are to be interpreted with the meaning of the key word ("must", "should",
-        "may", etc) used in introducing the algorithm.
-      </p>
-      <p>
-        Some conformance requirements are phrased as requirements on attributes, methods or objects. Such requirements
-        are to be interpreted as requirements on user agents.
-      </p>
-      <p>
-        Conformance requirements phrased as algorithms or specific steps MAY be implemented in any manner, so long as
-        the end result is equivalent. (In particular, the algorithms defined in this specification are intended to be
-        easy to follow, and not intended to be performant.)
-      </p>
-      <p>
-        The only conformance class defined by this specification is a <dfn>user agent</dfn>.
-      </p>
-      <p>
-        User agents MAY impose implementation-specific limits on otherwise unconstrained inputs, e.g. to prevent denial
-        of service attacks, to guard against running out of memory, or to work around platform-specific limitations.
-      </p>
-      <p>
-        When support for a feature is disabled (e.g. as an emergency measure to mitigate a security problem, or to aid
-        in development, or for performance reasons), user agents MUST act as if they had no support for the feature
-        whatsoever, and as if the feature was not mentioned in this specification. For example, if a particular feature
-        is accessed via an attribute in a Web IDL interface, the attribute itself would be omitted from the objects
-        that implement that interface - leaving the attribute on the object but making it return null or throw an
-        exception is insufficient.
-      </p>
-      <section>
-        <h3>
-          Dependencies
-        </h3>This specification relies on several other underlying specifications.
-        <dl>
-          <dt>
-            HTML
-          </dt>
-          <dd>
-            Many fundamental concepts from HTML are used by this specification. [[!HTML5]]
-          </dd>
-          <dt>
-            WebIDL
-          </dt>
-          <dd>
-            The IDL blocks in this specification use the semantics of the WebIDL specification. [[!WEBIDL]]
-          </dd>
-        </dl>
-      </section>
-    </section>
-    <section>
-      <h3>
-        Terminology
-      </h3>
-      <p>
-        The construction "a <code>Foo</code> object", where <code>Foo</code> is actually an interface, is sometimes
-        used instead of the more accurate "an object implementing the interface <code>Foo</code>".
-      </p>
-      <p>
-        The term DOM is used to refer to the API set made available to scripts in Web applications, and does not
-        necessarily imply the existence of an actual <code>Document</code> object or of any other <code>Node</code>
-        objects as defined in the DOM Core specifications. [[!DOM4]]
-      </p>
-      <p>
-        An IDL attribute is said to be <em>getting</em> when its value is being retrieved (e.g. by author script), and
-        is said to be <em>setting</em> when a new value is assigned to it.
-      </p>
-      <p>
-        A <dfn>valid service type</dfn> is any of the following:
-      </p>
-      <ul>
-        <li>a string that begins with <code>upnp:</code> or <code>zeroconf:</code> followed by one or more characters
-        in the ranges U+0021, U+0023 to U+0027, U+002A to U+002B, U+002D to U+002E, U+0030 to U+0039, U+0041 to U+005A,
-        U+005E to U+007E.
-        </li>
-        <li>a string that begins with <code>dial:</code> followed by an integer version.
-        </li>
-      </ul>
-      <p>
-        A <a>valid service type</a> provided in the <code>type</code> attribute of the <a href=
-        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method will be matched against the
-        services currently contained in the <a>list of available service records</a> according to the algorithms
-        defined in this specification.
-      </p>
-      <p>
-        A <dfn>user-agent generated callback url</dfn> is a Local-network accessible URL endpoint that a <a>user
-        agent</a> generates and maintains for receiving HTTP NOTIFY requests from UPnP Event sources. It is only
-        required when the user agent implements UPnP Service Discovery as defined in this specification.
-      </p>
-      <p>
-        In this specification we use the following terms to describe the processes required for Local-networked
-        Services management:
-      </p>
-      <ul>
-        <li>A <dfn>new service</dfn> is a Local-networked Service that has not previously been discovered or registered
-        in the <a>list of available service records</a>.
-        </li>
-        <li>An <dfn>existing service</dfn> is a Local-networked Service that has previously been discovered and is
-        registered in the <a>list of available service records</a>.
-        </li>
-        <li>A <dfn>current service</dfn> is a Local-networked Service, represented by a <a href=
-        "#networkservice"><code>NetworkService</code></a> object, that is currently being shared with a web page via a
-        <a href="#networkservices"><code>NetworkServices</code></a> object registered in the <a>list of active service
-        managers</a>.
-        </li>
-      </ul>
-      <p>
-        A <dfn>network services whitelist</dfn> is a list of zero or more <a>valid service type</a> tokens that, when
-        matched to a service type discovered in the local network, enables that service to be shared with a web page
-        even if that Local-networked Service does not itself allow Cross-Origin Resource Sharing [[!CORS]]. A <a>user
-        agent</a> MUST simulate CORS support for all service interaction in this case. Implementation of this feature
-        is at implementer's discretion. When a <a>user agent</a> does not implement a <a>network services whitelist</a>
-        then it is to treat this as always being an empty list.
-      </p>
-    </section>
-    <section>
-      <h2>
-        Security and privacy considerations
-      </h2>
-      <p>
-        The API defined in this specification can be used to find and connect to devices and services within a user's
-        current network. This discloses information related to a user's network: devices available on their network and
-        the publicly-accessible services ("networked services") currently running and available on those devices. The
-        distribution of this information could potentially compromise the user's privacy. A conforming implementation
-        of this specification MUST provide a mechanism that protects the user's privacy. This mechanism MUST ensure
-        that no networked service information is retrievable without the user's express permission.
-      </p>
-      <section>
-        <h3>
-          Security considerations for API implementations
-        </h3>
-        <p>
-          A <a>user agent</a> SHOULD only allow web pages to connect with Local-networked Services that have passed a
-          <a>preliminary CORS check</a> indicating they support Cross-Origin Resource Sharing [[!CORS]]. In this way, a
-          <a>user agent</a> SHOULD NOT allow web pages to access other arbitrary networked services on the current
-          local network.
-        </p>
-        <p>
-          A <a>user agent</a> MAY provide a way for users to enable access to non-CORS enabled Local-networked Services
-          from web pages (i.e. operate a <a>network services whitelist</a>). Implementation of such a <a>network
-          services whitelist</a>, if any, is left to an implementer's discretion. Such a whitelist may be configurable
-          by each user at runtime or may be managed by the implementation itself on behalf of its users. In the case
-          that a <a>user agent</a> provides a <a>network services whitelist</a>, it MUST act as if all URLs for the
-          Local-networked Service corresponding to any previously whitelisted service type had Cross-Origin Resource
-          Sharing [[!CORS]] enabled indefinitely.
-        </p>
-      </section>
-      <section>
-        <h3>
-          Privacy considerations for API implementations
-        </h3>
-        <p>
-          A <a>user agent</a> MUST NOT provide networked service information to web sites without the express
-          permission of the user. A user agent MUST acquire permission through a user interface, unless they have
-          prearranged trust relationships with users, as described below. The user interface MUST include the document
-          base URL. Those permissions that are acquired through the user interface and that are preserved beyond the
-          current browsing session (i.e. beyond the time when the browsing context is navigated to another URL) MUST be
-          revocable and a user agent MUST respect revoked permissions.
-        </p>
-        <p>
-          Obtaining the user's express permission to access one API method does not imply the user has granted
-          permission for the same web site to access any other methods that may be provided by this API, or to access
-          the same method with a different set of arguments, as part of the same permission context. If a user has
-          expressed permission for an implementation to, e.g. find a set of existing networked services, the
-          implementation MUST seek the user's express permission if and when any subsequent functions are called on
-          this API.
-        </p>
-        <p>
-          A user agent MAY have prearranged trust relationships that do not require such user interfaces. For example,
-          while a web browser will present a user interface when a web site performs a networked service lookup, a
-          different runtime may have a prearranged, delegated security relationship with the user and, as such, a
-          suitable alternative security and privacy mechanism with which to authorise the retrieval of networked
-          service information.
-        </p>
-      </section>
-      <section class="informative">
-        <h3>
-          Additional API implementation considerations
-        </h3>
-        <p>
-          Further to the requirements listed in the previous section, implementers of the Network Service Discovery API
-          are also advised to consider the following aspects that can negatively affect the privacy of their users: in
-          certain cases, users can inadvertently grant permission to the user agent to disclose networked services to
-          Web sites. In other cases, the content hosted at a certain URL changes in such a way that previously granted
-          networked service permissions no longer apply as far as the user is concerned. Or the users might simply
-          change their minds.
-        </p>
-        <p>
-          Predicting or preventing these situations is inherently difficult. Mitigation and in-depth defensive measures
-          are an implementation responsibility and not prescribed by this specification. However, in designing these
-          measures, implementers are advised to enable user awareness of networked service sharing, and to provide easy
-          access to interfaces that enable revocation of permissions that web applications have for accessing networked
-          services via this API.
-        </p>
-      </section>
-    </section>
-    <section>
-      <h2>
-        Requesting networked services
-      </h2>
-      <pre class="widl">
-[Supplemental, NoInterfaceObject]
-interface <dfn id="navigatornetworkservice">NavigatorNetworkService</dfn> {
-  <a class="externalDFN"
-     href="http://dom.spec.whatwg.org/#promise">Promise</a> <a href=
-     "#dom-navigator-getnetworkservices">getNetworkServices</a>( in any type );
-};
-
-<a class="externalDFN"
-     href=
-     "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">Navigator</a> implements <a href=
-     "#navigatornetworkservice">NavigatorNetworkService</a>;
-</pre>
-      <section>
-        <h2>
-          Methods
-        </h2>
-        <dl class="domintro">
-          <dt>
-            <var title="">promise</var> = <var title="">window</var> . <code title="dom-navigator"><a href=
-            "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">navigator</a></code> .
-            <code title="dom-navigator-getNetworkServices"><a href=
-            "#dom-navigator-getnetworkservices">getNetworkServices</a></code> ( <var title="">type</var> )
-          </dt>
-          <dd>
-            <p>
-              Immediately returns a new <a href="http://dom.spec.whatwg.org/#promise"
-                 class="externalDFN">Promise</a> object and then the user is prompted to select discovered network
-                 services that have advertised support for the requested service type(s).
-            </p>
-            <p>
-              The <var title="">type</var> argument contains one or more <a>valid service type</a> tokens that the web
-              page would like to interact with.
-            </p>
-            <p>
-              If the user accepts, the <var title="">promise</var> object is <a class="externalDFN"
-                 href="http://dom.spec.whatwg.org/#concept-resolver-resolve">resolved</a>, with a <a href=
-                 "#networkservices"><code>NetworkServices</code></a> object as its argument.
-            </p>
-            <p>
-              If the user declines, or an error occurs, the <var title="">promise</var> object is <a class=
-              "externalDFN"
-                 href="http://dom.spec.whatwg.org/#concept-resolver-reject">rejected</a>.
-            </p>
-          </dd>
-        </dl>
-        <div>
-          <p>
-            When the <dfn id="dom-navigator-getnetworkservices"
-               title="dom-navigator-getnetworkservices"><code>getNetworkServices(type)</code></dfn> method is called,
-               the <a>user agent</a> MUST run the following steps:
-          </p>
-          <ol class="rule">
-            <li>Let <var>Network Service Promise</var> be a new <a href="http://dom.spec.whatwg.org/#promise"
-                  class="externalDFN"><code>Promise</code></a> object.
-            </li>
-            <li>Let <var>Network Service Promise's Resolver</var> be the default <a href=
-            "http://dom.spec.whatwg.org/#concept-resolver"
-                  class="externalDFN">resolver</a> of <var>Network Service Promise</var>.
-            </li>
-            <li>Return <var>Network Service Promise</var>, and run the remaining steps asynchronously.
-            </li>
-            <li>Let <var>requested control types</var> be initially set to an empty array.
-            </li>
-            <li>If <var>type</var> is an array consisting of one or more <a>valid service type</a> tokens, then let
-            <var>requested control types</var> be the value of <var>type</var>, removing any non-<a>valid service
-            type</a> tokens from the resulting array.
-            </li>
-            <li>If <var>type</var> is a string consisting of one <a>valid service type</a> token, then let
-            <var>requested control types</var> be an array containing one item with a value of <var>type</var>.
-            </li>
-            <li>If <var>requested control types</var> is an array that contains at least one or more <a title=
-            "valid service type">valid service type</a> tokens then continue to the step labeled <em>process</em>
-            below. Otherwise, reject <var>Network Service Promise</var> by running the <a href=
-            "http://dom.spec.whatwg.org/#concept-resolver-reject"
-                  class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                  class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the string
-                  value "UnknownTypePrefixError" (<a href=
-                  "#dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a>) and whose
-                  <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                  error, abort any remaining steps and return.
-            </li>
-            <li>
-              <em>Process</em>: Let <var>services found</var> be an empty array.
-            </li>
-            <li>For each <var>available service</var> in the <a>list of available service records</a> run the following
-            steps:
-              <ol class="rule">
-                <li>For each <var>requested control type</var> in <var>requested control types</var>: If <var>available
-                service</var>'s <code>type</code> attribute equals the <var>requested control type</var> then let <var>
-                  matched service</var> equal the value of <var>available service</var>. Otherwise, abort the remaining
-                  sub-steps and continue above at the next <var>available service</var>.
-                </li>
-                <li>If <var>matched service</var> is not empty then run the following steps:
-                  <ol class="rule">
-                    <li>Let <var>CORS check result</var> be the result of running the <a>preliminary CORS check</a>
-                    algorithm, passing in <var>matched services</var>'s <code>url</code> attribute as the <var>control
-                    endpoint URL</var> argument and the <a href=
-                    "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
-                          class="externalDFN">entry script</a>'s <a href=
-                          "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
-                          class="externalDFN">origin</a> as the <var>request origin</var> argument.
-                    </li>
-                    <li>If <var>CORS check result</var> is not <code>pass</code> and <var>matched service</var>'s
-                    <code>type</code> attribute is also not present in the <a>network services whitelist</a> then abort
-                    the remaining sub-steps and continue above at the next <var>available service</var>.
-                    </li>
-                    <li>Let <var>new service object</var> be a new <a href=
-                    "#networkservice"><code>NetworkService</code></a> object, mapping the parameters of <var>matched
-                    service</var> to this new object where possible.
-                    </li>
-                    <li>Append <var>new service object</var> to the <var>services found</var> array.
-                    </li>
-                  </ol>
-                </li>
-              </ol>
-            </li>
-            <li>Optionally, e.g. based on a previously-established user preference, for security reasons, or due to
-            platform limitations, the <a>user agent</a> MAY reject <var>Network Service Promise</var> by running the
-            <a href="http://dom.spec.whatwg.org/#concept-resolver-reject"
-                  class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                  class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the string
-                  value "PermissionDeniedError" (<a href=
-                  "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) and whose
-                  <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                  error, abort any remaining steps and return.
-            </li>
-            <li>The user agent MUST NOT provide the entry script's origin with a <a href=
-            "#networkservices"><code>NetworkServices</code></a> object without prior permission given by the user.
-              <p>
-                If <var>services found</var> is not an empty array then the <a>user agent</a> MAY choose to prompt the
-                user in a user-agent-specific manner for permission to provide the <a href=
-                "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
-                   class="externalDFN">entry script</a>'s <a href=
-                   "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
-                   class="externalDFN">origin</a> with a <a href="#networkservices"><code>NetworkServices</code></a>
-                   object representing the <a>user-authorized</a> subset of <var>services found</var>.
-              </p>
-              <p>
-                Alternatively, the user agent MAY wish to skip this user opt-in step and choose to fulfill <var>Network
-                Service Promise</var> immediately based on a previously-established user preference, for security
-                reasons, or due to platform limitations. In such an implementation, if <var>Network Service
-                Promise</var> is to be fulfilled as a result of a previously-established user preference then the
-                <a>user agent</a> MUST continue at the next step of this algorithm.
-              </p>
-              <p>
-                If permission has been granted by the user to access one or more networked services then the <a>user
-                agent</a> SHOULD include an "ongoing local-network communication" indicator.
-              </p>
-              <p>
-                If permission has been denied by the user, <a>user agent</a> or platform, then the <a>user agent</a>
-                MUST reject <var>Network Service Promise</var> by running the <a href=
-                "http://dom.spec.whatwg.org/#concept-resolver-reject"
-                   class="externalDFN">resolver reject algorithm</a> against the <var>Network Service Promise's
-                   Resolver</var>, passing in a newly constructed <a href="http://dom.spec.whatwg.org/#domerror"
-                   class="externalDFN"><code>DOMError</code></a> object whose <code>name</code> attribute has the
-                   string value "PermissionDeniedError" (<a href=
-                   "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) and whose
-                   <code>message</code> attribute has a helpful implementation-dependent message that explains this
-                   error, abort any remaining steps and return.
-              </p>
-              <p>
-                If the user never responds or no previously-established user preference has been met, this algorithm
-                stalls on this step.
-              </p>
-            </li>
-            <li>Let <var>services</var> be an empty array.
-            </li>
-            <li>If <var>services found</var> is not an empty array then set <var>services</var> to be an array of one
-            or more <a href="#networkservice"><code>NetworkService</code></a> objects for which the user granted
-            permission above - known as the current objects <dfn>user-authorized</dfn> services.
-            </li>
-            <li>For each Object <var>service</var> in <var>services</var>, if any, run the following sub-steps:
-              <ol class="rule">
-                <li>If <var>service</var>'s <code>type</code> parameter begins with the DOMString "<code>upnp:</code>"
-                and the <var>service</var>'s <code>eventsUrl</code> parameter is not empty then <a>setup a UPnP Events
-                Subscription</a> for <var>service</var>.
-                </li>
-              </ol>
-            </li>
-            <li>Let <var>services manager</var> be a new <a href="#networkservices"><code>NetworkServices</code></a>
-            object.
-            </li>
-            <li>Store <var>requested control types</var> against <var>services manager</var> as an internal variable.
-            </li>
-            <li>Set <var>services manager</var>'s <a href=
-            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute to the number of
-            items currently found in the <a>list of available service records</a> whose <code>type</code> property
-            matches any of the tokens requested in <var>requested control types</var>.
-            </li>
-            <li>Add <var>services</var>, if any, to the <var>services manager</var> object as its collection of
-            <a>indexed properties</a>. If <var>services</var> is an empty array then the <var>services manager</var>
-            does not have any <var>indexed properties</var>.
-            </li>
-            <li>Set <var>services manager</var>'s <a href="#dom-networkservices-length"><code>length</code></a>
-            attribute to the number of items in <var>services</var>.
-            </li>
-            <li>Add <var>services manager</var> to the <a>list of active service managers</a>.
-            </li>
-            <li>The <a>user agent</a> MUST fulfill <var>Network Service Promise</var> by running the <a href=
-            "http://dom.spec.whatwg.org/#concept-resolver-fulfill"
-                  class="externalDFN">resolver fulfill algorithm</a> against the <var>Network Service Promise's
-                  Resolver</var>, passing in <var>services manager</var> as its argument.
-            </li>
-          </ol>
-          <p>
-            The <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#task-source"
-               class="externalDFN">task source</a> for these <a href=
-               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#concept-task"
-               class="externalDFN">tasks</a> is the <a href=
-               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#user-interaction-task-source"
-               class="externalDFN">user interaction task source</a>.
-          </p>
-          <p>
-            The <dfn>preliminary CORS check</dfn> algorithm determines whether a Local-networked Service supports
-            Cross-Origin Resource Sharing [[!CORS]] as part of a call to the <a href=
-            "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method, prior to that service
-            being proposed for sharing to users and prior to active sharing with web pages. This algorithm takes two
-            arguments, <var>control endpoint URL</var> and <var>request origin</var>, and consists of running the
-            following steps:
-          </p>
-          <ol class="rule">
-            <li>Let <var>CORS available check</var> be the result of applying the <a href=
-            "http://www.w3.org/TR/cors/#make-a-request-steps"
-                  class="externalDFN">make a request steps</a> [[!CORS]], setting the <a href=
-                  "http://www.w3.org/TR/cors/#request-method"
-                  class="externalDFN">request method</a> to <code>OPTIONS</code>, the <a href=
-                  "http://www.w3.org/TR/cors/#request-url"
-                  class="externalDFN">request URL</a> to <var>control endpoint URL</var>, the <a href=
-                  "http://www.w3.org/TR/cors/#source-origin"
-                  class="externalDFN">source origin</a> to <var>request origin</var>, setting the <a href=
-                  "http://www.w3.org/TR/cors/#omit-credentials-flag"
-                  class="externalDFN">omit credentials flag</a> to <code>true</code> and including an <a href=
-                  "http://www.w3.org/TR/cors/#http-access-control-request-method"
-                  class="externalDFN"><code>Access-Control-Request-Method</code></a> header with a value of
-                  <code>GET</code>.
-            </li>
-            <li>If <var>CORS available check</var> is cancelled by the user, or it results in a network error, or its
-            response does not have an HTTP status code of <code>200</code> then abort any remaining steps and return
-            <code>fail</code>.
-            </li>
-            <li>Return the result of running the <a href="http://www.w3.org/TR/cors/#resource-sharing-check"
-                  class="externalDFN">resource sharing check</a> [[!CORS]] against the successful HTTP response of the
-                  <var>CORS available check</var>.
-              <p class="note">
-                This returned result will always be either <code>pass</code> or <code>fail</code>.
-              </p>
-            </li>
-          </ol>
-          <p>
-            There is no implied persistence to networked service sharing provided to a web page. It MUST NOT be
-            possible to access a networked service previously granted to a web page without user authorization in all
-            of the following cases:
-          </p>
-          <ul>
-            <li>If the current script is reloaded at any point in the same or different window.
-            </li>
-            <li>if the current script reinvokes the <a href=
-            "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method at any point in its
-            execution.
-            </li>
-            <li>If the user navigates forward or back in their history to reload the current page.
-            </li>
-            <li>If a script is running in a different origin.
-            </li>
-          </ul>
-        </div>
-      </section>
-      <section>
-        <h3>
-          Error Handling
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">error</var> . <code title="dom-NavigatorNetworkServiceError-name"><a href=
-            "#dom-domerror-extensions-name">name</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current error's error name. At the current time, this will be "PermissionDeniedError" or
-              "UnknownTypePrefixError", for which the corresponding error constants <a href=
-              "#dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></a> and <a href=
-              "#dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a> are defined.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-domerror-extensions-name"
-             title="dom-domerror-extensions-name"><code>name</code></dfn> attribute of a <a href=
-             "http://dom.spec.whatwg.org/#domerror"
-             class="externalDFN"><code>DOMError</code></a> object returned from this API <em class="ct">MUST</em>
-             return the name for the error, which will be one of the following:
-        </p>
-        <dl>
-          <dt>
-            <dfn id="dom-domerror-extensions-permission_denied"
-                title="dom-domerror-extensions-permission_denied"><code>PERMISSION_DENIED_ERR</code></dfn> (DOMString
-                value "PermissionDeniedError")
-          </dt>
-          <dd>
-            The user or user agent denied the page permission to access any services.
-          </dd>
-          <dt>
-            <dfn id="dom-domerror-extensions-unknown_type_prefix"
-                title="dom-domerror-extensions-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></dfn>
-                (DOMString value "UnknownTypePrefixError")
-          </dt>
-          <dd>
-            No <a>valid service type</a> tokens were provided in the method invocation.
-          </dd>
-        </dl>
-      </section>
-    </section>
-    <section>
-      <h2>
-        Obtaining networked services
-      </h2>
-      <p>
-        The <a href="#networkservices"><code>NetworkServices</code></a> interface represents a collection of zero or
-        more <a>indexed properties</a> that are each a <a>user-authorized</a> <a href=
-        "#networkservice"><code>NetworkService</code></a> object.
-      </p>
-      <p>
-        A <a href="#networkservices"><code>NetworkServices</code></a> object is the <a href=
-        "http://dom.spec.whatwg.org/#concept-promise-result"
-           class="externalDFN">promise result</a> from a call to <a href=
-           "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a>.
-      </p>
-      <pre class="widl">
-[NoInterfaceObject]
-interface <dfn id="networkservices">NetworkServices</dfn> {
-  readonly attribute unsigned long    <a href="#dom-networkservices-length">length</a>;
-  getter <a href="#networkservice">NetworkService</a> (unsigned long index);
-  <a href="#networkservice">NetworkService</a>? <a href=
-"#dom-networkservices-getservicebyid">getServiceById</a>(DOMString id);
-
-  readonly attribute unsigned long    <a href="#dom-networkservices-servicesavailable">servicesAvailable</a>;
-
-  // event handler attributes
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onservicefound">onservicefound</a>;
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onservicelost">onservicelost</a>;
-
-};
-
-<a href="#networkservices">NetworkServices</a> implements <a href=
-"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
-     class="externalDFN">EventTarget</a>;
-</pre>
-      <section>
-        <h2>
-          Attributes
-        </h2>
-        <dl class="domintro">
-          <dt>
-            <code title="dom-networkservices-length"><a href="#dom-networkservices-length">length</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current number of <a>indexed properties</a> in the current object's collection.
-            </p>
-          </dd>
-          <dt>
-            <code title="dom-networkservices-servicesavailable"><a href=
-            "#dom-networkservices-servicesavailable">servicesAvailable</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns the current number of items matching one of the app-requested <a>valid service type</a> tokens in
-              the <a>list of available service records</a>.
-            </p>
-          </dd>
-        </dl>
-        <div>
-          <p>
-            The <dfn id="dom-networkservices-length"><code>length</code></dfn> attribute MUST return the number of
-            <a href="#networkservice"><code>NetworkService</code></a> objects represented by the collection.
-          </p>
-          <p>
-            The <dfn id="dom-networkservices-servicesavailable"><code>servicesAvailable</code></dfn> attribute MUST
-            return the number of services in the <a>list of available service records</a> whose <code>type</code>
-            attribute matches any of the <a>valid service type</a> tokens that were initially used to create the
-            current <a href="#networkservices"><code>NetworkServices</code></a> object.
-          </p>
-        </div>
-      </section>
-      <section>
-        <h2>
-          Methods
-        </h2>
-        <dl class="domintro">
-          <dt>
-            <code title="networkservices-getter"><a href="#networkservices">services</a></code> [ <var title=
-            "">index</var> ]
-          </dt>
-          <dd>
-            <p>
-              Returns the specified <a href="#networkservice"><code>NetworkService</code></a> object.
-            </p>
-          </dd>
-          <dt>
-            <code title="networkservices-getter"><a href="#networkservices">services</a></code> . <code title=
-            "dom-networkservices-getservicebyid"><a href=
-            "#dom-networkservices-getservicebyid">getServiceById</a></code> ( <var title="">id</var> )
-          </dt>
-          <dd>
-            <p>
-              Returns the <a href="#networkservice"><code>NetworkService</code></a> object with the given identifier,
-              or null if no service has that identifier.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          A <a href="#networkservices"><code>NetworkServices</code></a> object represents the current collection of
-          zero or more <a href="#networkservice"><code>NetworkService</code></a> objects - its <a>indexed
-          properties</a>. The <a>indexed properties</a> of a <a href=
-          "#networkservices"><code>NetworkServices</code></a> object are <span>immutable</span> meaning that <a>indexed
-          properties</a> cannot be added and <a>indexed properties</a> cannot be removed for the lifetime of a <a href=
-          "#networkservices"><code>NetworkServices</code></a> object.
-        </p>
-        <p>
-          The <a href=
-          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#supported-property-indices"
-             class="externalDFN">supported property indices</a> of <a href=
-             "#networkservices"><code>NetworkServices</code></a> objects at any instant are the numbers from zero to
-             the number of the <a href="#networkservice"><code>NetworkService</code></a> objects in the collection
-             minus one.
-        </p>
-        <p class="note">
-          Each service in a <a href="#networkservices"><code>NetworkServices</code></a> object thus has an index; the
-          first has the index 0, and each subsequent service is numbered one higher than the previous one.
-        </p>
-        <p>
-          To <a href=
-          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#determine-the-value-of-an-indexed-property"
-             class="externalDFN">determine the value of an indexed property</a> for a given index <var>index</var> in a
-             <a href="#networkservices"><code>NetworkServices</code></a> object the user agent MUST return the <a href=
-             "#networkservice"><code>NetworkService</code></a> object that represents the <var>index</var>th item in
-             the collection.
-        </p>
-        <p>
-          The <dfn id="dom-networkservices-getservicebyid"><code>getServiceById(id)</code></dfn> method <em class=
-          "ct">MUST</em> return the first <a href="#networkservice"><code>NetworkService</code></a> object in the
-          collection whose <a href="#dom-networkservice-id"><code>id</code></a> attribute is equal to the value of the
-          <var>id</var> argument provided. When no <a href="#networkservice"><code>NetworkService</code></a> objects
-          match the given argument, the method MUST return null.
-        </p>
-      </section>
-      <section>
-        <h2>
-          Events
-        </h2>
-        <p>
-          The following are the event handlers (and their corresponding event handler event types) that <em class=
-          "ct">MUST</em> be supported, as IDL attributes, by all objects implementing the <a href=
-          "#networkservices"><code>NetworkServices</code></a> interface:
-        </p>
-        <table border="1">
-          <thead>
-            <tr>
-              <th>
-                <span title="event handlers">Event handler</span>
-              </th>
-              <th>
-                <span>Event handler event type</span>
-              </th>
-            </tr>
-          </thead>
-          <tbody>
-            <tr>
-              <td>
-                <dfn id="dom-networkservices-onservicefound"
-                    title="dom-NetworkServices-onservicefound"><code>onservicefound</code></dfn>
-              </td>
-              <td>
-                <a href="#event-servicefound"><code>servicefound</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservices-onservicelost"
-                    title="dom-NetworkServices-onservicelost"><code>onservicelost</code></dfn>
-              </td>
-              <td>
-                <a href="#event-servicelost"><code>servicelost</code></a>
-              </td>
-            </tr>
-          </tbody>
-        </table>
-      </section>
-    </section>
-    <section>
-      <h2>
-        Communicating with a networked service
-      </h2>
-      <p>
-        The <a href="#networkservice"><code>NetworkService</code></a> interface is used to provide a set of connection
-        information for an HTTP service endpoint and if available, service events, running on a networked device.
-      </p>
-      <pre class="widl">
-[NoInterfaceObject]
-interface <dfn id="networkservice">NetworkService</dfn> {
-  readonly attribute DOMString        <a href="#dom-networkservice-id">id</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-name">name</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-type">type</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-url">url</a>;
-  readonly attribute DOMString        <a href="#dom-networkservice-config">config</a>;
-
-  readonly attribute boolean          <a href="#dom-networkservice-online">online</a>;
-
-  // event handler attributes
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onavailable">onavailable</a>;
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onunavailable">onunavailable</a>;
-
-           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
-     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onnotify">onnotify</a>;
-};
-
-<a href="#networkservice">NetworkService</a> implements <a href=
-"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
-     class="externalDFN">EventTarget</a>;
-</pre>
-      <section>
-        <h2>
-          Attributes
-        </h2>
-        <dl class="domintro">
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-id"><a href=
-            "#dom-networkservice-id">id</a></code>
-          </dt>
-          <dd>
-            <p>
-              A unique identifier for the given user-selected service instance.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-name"><a href=
-            "#dom-networkservice-name">name</a></code>
-          </dt>
-          <dd>
-            <p>
-              The name of the user-selected service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-type"><a href=
-            "#dom-networkservice-type">type</a></code>
-          </dt>
-          <dd>
-            <p>
-              The <a>valid service type</a> token value of the user-selected service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-url"><a href=
-            "#dom-networkservice-url">url</a></code>
-          </dt>
-          <dd>
-            <p>
-              The control URL endpoint (including any required port information) of the user-selected control service.
-            </p>
-          </dd>
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-config"><a href=
-            "#dom-networkservice-config">config</a></code>
-          </dt>
-          <dd>
-            <p>
-              The configuration information associated with the service depending on the requested service type.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-networkservice-id"><code>id</code></dfn> attribute is a unique identifier for the service.
-          The same service provided at different times or on different objects MUST have the same <a href=
-          "#dom-networkservice-id"><code>id</code></a> value.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-name"><code>name</code></dfn> attribute represents a human-readable title for
-          the service.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-type"><code>type</code></dfn> attribute reflects the value of the <a>valid
-          service type</a> of the service.
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-url"><code>url</code></dfn> attribute is an <a href=
-          "http://url.spec.whatwg.org/#concept-absolute-url"
-             class="externalDFN">absolute URL</a> pointing to the root HTTP endpoint for the service. Web pages can
-             subsequently use this value for implicit cross-document messaging via various existing mechanisms (e.g.
-             Web Sockets, Server-Sent Events, Web Messaging, XMLHttpRequest).
-        </p>
-        <p>
-          The <dfn id="dom-networkservice-config"><code>config</code></dfn> attribute provides the raw configuration
-          information extracted from the given network service.
-        </p>
-      </section>
-      <section>
-        <h3>
-          States
-        </h3>
-        <dl class="domintro">
-          <dt>
-            <var title="">service</var> . <code title="dom-networkservice-online"><a href=
-            "#dom-networkservice-online">online</a></code>
-          </dt>
-          <dd>
-            <p>
-              Returns <code>true</code> if the service is reporting that it is accessible on the local network or
-              <code>false</code> if the service is no longer accessible (temporarily or permanently) on the local
-              network.
-            </p>
-          </dd>
-        </dl>
-        <p>
-          The <dfn id="dom-networkservice-online"><code>online</code></dfn> attribute indicates whether the service is
-          either <var>online</var>, and therefore accessible on the local network, in which case this attribute will
-          return <code>true</code> or, <var>offline</var>, and therefore not accessible on the local network, either
-          temporarily or permanently, in which case this attribute will return <code>false</code>. This attribute MUST
-          default to <code>true</code>.
-        </p>
-      </section>
-      <section>
-        <h3>
-          Events
-        </h3>
-        <p>
-          The following are the event handlers (and their corresponding event handler event types) that <em class=
-          "ct">MUST</em> be supported, as IDL attributes, by all objects implementing the <a href=
-          "#networkservice"><code>NetworkService</code></a> interface:
-        </p>
-        <table border="1">
-          <thead>
-            <tr>
-              <th>
-                <span title="event handlers">Event handler</span>
-              </th>
-              <th>
-                <span>Event handler event type</span>
-              </th>
-            </tr>
-          </thead>
-          <tbody>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onnotify"
-                    title="dom-NetworkService-onnotify"><code>onnotify</code></dfn>
-              </td>
-              <td>
-                <a href="#event-notify"><code>notify</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onavailable"
-                    title="dom-NetworkService-onavailable"><code>onavailable</code></dfn>
-              </td>
-              <td>
-                <a href="#event-available"><code>available</code></a>
-              </td>
-            </tr>
-            <tr>
-              <td>
-                <dfn id="dom-networkservice-onunavailable"
-                    title="dom-NetworkService-onunavailable"><code>onunavailable</code></dfn>
-              </td>
-              <td>
-                <a href="#event-unavailable"><code>unavailable</code></a>
-              </td>
-            </tr>
-          </tbody>
-        </table>
-      </section>
-    </section>
-    <section>
-      <h2>
-        Service Discovery
-      </h2>
-      <p>
-        A <a>user agent</a> conforming to this specification MAY implement <abbr title=
-        "Simple Service Discovery Protocol">SSDP</abbr> [[!UPNP-DEVICEARCH11]], Zeroconf [[!DNS-SD]] + [[!MDNS]] and/or
-        <abbr title="Discovery and Launch Protocol">DIAL</abbr> [<a href=
-        "https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification">DIAL</a>] <dfn>service
-        discovery mechanisms</dfn> - the requirements detailed in this section of the specification - to enable Web
-        pages to request and connect with HTTP services running on networked devices, discovered via any of these
-        mechanisms, through this API. When a <a>user agent</a> implements any of these <a>service discovery
-        mechanisms</a>, then it MUST conform to the corresponding algorithms provided in this section of the
-        specification.
-      </p>
-      <p>
-        This section presents how the results of these <a>service discovery mechanisms</a> will be matched to requested
-        service types, how the user agent stores available and active services and how their properties are applied to
-        any resulting <a href="#networkservice"><code>NetworkService</code></a> objects.
-      </p>
-      <p>
-        It is expected that user agents will perform these <a>service discovery mechanisms</a> asynchronously and
-        periodically update the <a>list of available service records</a> as required. The timing of any <a>service
-        discovery mechanisms</a> is an implementation detail left to the discretion of the implementer (e.g. by
-        continuously monitoring the network as a background process or on invocation of this API from a Web page).
-      </p>
-      <p>
-        The <dfn>list of available service records</dfn> is a single dynamic internal lookup table within user agents
-        that is used to track all the services that have been discovered and are available in the current network at
-        the current time. At any point during the running of any of the <a>service discovery mechanisms</a> then
-        existing entries within this table can be updated, entries can be added and entries can be removed as the
-        status of networked services changes according to the rules defined in this specification.
-      </p>
-      <p>
-        The <dfn>list of active service managers</dfn> is an internal list within user agents that is used to track all
-        <a href="#networkservices"><code>NetworkServices</code></a> objects currently being shared with any web pages
-        at the current time within the user agent. Each <a href="#networkservices"><code>NetworkServices</code></a>
-        object in the <a>list of active service managers</a> represents a collection of zero or more <a href=
-        "#networkservice"><code>NetworkService</code></a> objects - known as its <dfn>indexed properties</dfn>.
-        <a href="#networkservice"><code>NetworkService</code></a> objects are attached as the <a>indexed properties</a>
-        of a <a href="#networkservices"><code>NetworkServices</code></a> object as part of the <a href=
-        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> algorithm.
-      </p>
-      <p>
-        The rule for <dfn>adding an available service</dfn> is the process of adding a <a>new service</a> or updating
-        an <a>existing service</a> that is generally available on the user's current network in the <a>list of
-        available service records</a>. This rule takes one argument, <var>network service record</var>, and consists of
-        running the following steps:
-      </p>
-      <ol class="rule">
-        <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
-        the following sub-steps:
-          <ol class="rule">
-            <li>If the <var>existing service record</var>'s <code>id</code> property does not equal <var>network
-            service record</var>'s <code>id</code> property then abort any remaining sub-steps and continue at the next
-            available <var>existing service record</var>.
-            </li>
-            <li>Replace the value of <var>existing service record</var> in the current <a>list of available service
-            records</a> with the value of <var>network service record</var>, aborting any remaining steps in this
-            algorithm and return.
-            </li>
-          </ol>
-        </li>
-        <li>Add <var>network service record</var> to the <a>list of available service records</a> as a new item.
-        </li>
-        <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following steps:
-          <ol class="rule">
-            <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
-              <ol class="rule">
-                <li>If the <var>network service record</var>'s <code>id</code> property equals the <var>active
-                service</var>'s <code>id</code> attribute and <var>active service</var>'s <code>online</code> attribute
-                is currently set to <code>false</code> then set <var>active service</var>'s <a href=
-                "#dom-networkservice-online"><code>online</code></a> attribute to <code>true</code> and then <a href=
-                "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                      class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                      "#event-available"><code>available</code></a> that uses the <a href=
-                      "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                      class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable,
-                      and has no default action, at the current <var>active service</var> object.
-                </li>
-              </ol>
-            </li>
-            <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
-            </li>
-            <li>For each <var>requested control type</var> of the <var>requested control types</var> in <var>service
-            manager</var> run the following steps:
-              <ol class="rule">
-                <li>If <var>network service record</var>'s <code>type</code> property does not equal <var>requested
-                control type</var> then abort any remaining sub-steps and continue at the next available <var>requested
-                control type</var>.
-                </li>
-                <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code>, abort any
-                remaining sub-steps and continue.
-                </li>
-              </ol>
-            </li>
-            <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
-            increment <var>service manager</var>'s <a href=
-            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code> and
-            then <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                  class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                  "#event-servicefound"><code>servicefound</code></a> that uses the <a href=
-                  "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable, and
-                  has no default action, at the current <var>service manager</var> object.
-            </li>
-          </ol>
-        </li>
-      </ol>
-      <p>
-        The rule for <dfn>removing an available service</dfn> is the general process of removing an <a>existing
-        service</a> from the <a>list of available service records</a> that has left the user's current network or has
-        otherwise expired. This rule takes one argument, <var>service identifier</var>, and consists of running the
-        following steps:
-      </p>
-      <ol class="rule">
-        <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
-        the following sub-steps:
-          <ol class="rule">
-            <li>If the <var>existing service record</var>'s <code>id</code> property does not match <var>service
-            identifier</var> then skip any remaining sub-steps for the current <var>existing service record</var> and
-            continue at the next available <var>existing service record</var>.
-            </li>
-            <li>Let <var>'service type in use' flag</var> be <code>false</code>.
-            </li>
-            <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following
-            steps:
-              <ol class="rule">
-                <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
-                </li>
-                <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
-                  <ol class="rule">
-                    <li>If <var>existing service record</var>'s <code>id</code> property equals the <var>active
-                    service</var>'s <code>id</code> attribute and <var>active service</var>'s <a href=
-                    "#dom-networkservice-online"><code>online</code></a> attribute is currently set to
-                    <code>true</code> then set <var>active service</var>'s <a href="#dom-networkservice-online"><code>
-                      online</code></a> attribute to <code>false</code> and then <a href=
-                      "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                          class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                          "#event-unavailable"><code>unavailable</code></a> that uses the <a href=
-                          "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                          class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not
-                          cancellable, and has no default action, at the current <var>active service</var>.
-                    </li>
-                  </ol>
-                </li>
-                <li>For each <var>requested control type</var> of the <var>requested control types</var> in
-                <var>service manager</var> run the following steps:
-                  <ol class="rule">
-                    <li>If <var>existing service record</var>'s <code>type</code> property does not equal
-                    <var>requested control type</var> then abort any remaining sub-steps and continue at the next
-                    available <var>requested control type</var>.
-                    </li>
-                    <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code> and the
-                    <var>'service type in use' flag</var> to <code>true</code>, abort any remaining sub-steps and
-                    continue.
-                    </li>
-                  </ol>
-                </li>
-                <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
-                decrement <var>service manager</var>'s <a href=
-                "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code>
-                and then <a href=
-                "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                      class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
-                      "#event-servicelost"><code>servicelost</code></a> that uses the <a href=
-                      "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                      class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable,
-                      and has no default action, at the current <var>service manager</var> object.
-                </li>
-              </ol>
-            </li>
-            <li>If the <var>'service type in use' flag</var> is <code>false</code> and the <var>existing service
-            record</var>'s <code>type</code> property begins with the DOMString "<code>upnp:</code>" and <var>existing
-            service record</var>'s <code>eventsURL</code> property is set then run the rule to <a>terminate an existing
-            UPnP Events Subscription</a>, if one is currently active (as a result of having previously called <a>setup
-            a UPnP Events Subscription</a> against the current <var>existing service record</var>).
-            </li>
-            <li>Remove <var>existing service record</var> from the current <a>list of available service records</a>.
-            </li>
-          </ol>
-        </li>
-      </ol>
-      <p>
-        User agents SHOULD expire a service record from the <a>list of available service records</a> when its
-        <code>expiryTimestamp</code> attribute exceeds the current UTC timestamp. When this condition is met the
-        <a>user agent</a> SHOULD run the rule for <a>removing an available service</a>, passing in the expired service
-        record's <code>id</code> attribute as the only argument.
-      </p>
-      <section>
-        <h4>
-          Zeroconf (<abbr title="Multicast DNS">mDNS</abbr> + <abbr title="Domain Name System">DNS</abbr>-<abbr title=
-          "Service Discovery">SD</abbr>)
-        </h4>
-        <p>
-          For each DNS response received from a user-agent-initiated Multicast DNS Browse for <abbr title=
-          "DNS Pointer Record">PTR</abbr> records with the name <code>_services._dns-sd._udp</code> on the resolved
-          recommended automatic browsing domain [[!MDNS]], the <a>user agent</a> MUST run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>service mDNS responses</var> be an array of PTR records received by issuing a Multicast DNS
-          Browse for PTR records with the name of the current discovered service type.
-          </li>
-          <li>For each Object <var>service mDNS response</var> in <var>service mDNS responses</var>, run the following
-          steps:
-            <ol>
-              <li>Let <var>network service record</var> be an Object consisting of the following empty properties:
-              <code>id</code>, <code>name</code>, <code>type</code>, <code>url</code>, <code>config</code>,
-              <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the value of the full PTR Service
-              Instance Name [[!MDNS]].
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the value of the PTR Service
-              Instance Name's <var>Instance</var> component [[!MDNS]].
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to the concatenation of the string
-              <code>zeroconf:</code> followed be the value of the PTR Service Instance Name's <var>Service</var>
-              component [[!MDNS]].
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the resolvable Service URL
-              obtained from performing an DNS-SD Lookup [[!DNS-SD]] of the current service from the PTR record provided
-              [[!MDNS]].
-              </li>
-              <li>Set <var>network service record</var>'s <code>config</code> property to the string value of the
-              contents of the first DNS-SD TXT record associated with the <var>service mDNS response</var> as defined
-              in [[!DNS-SD]].
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus a value of <code>120</code> seconds.
-              </li>
-              <li>Run the general rule for <a>adding an available service</a>, passing in the current <var>network
-              service record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-      </section>
-      <section>
-        <h5>
-          Simple Service Discovery Protocol (<abbr title="Simple Service Discovery Protocol">SSDP</abbr>)
-        </h5>
-        <p>
-          A user agent that implements UPnP service discovery MUST issue a <dfn>search request for UPnP root
-          devices</dfn> against the user's current local network according to the full normative text and timing
-          provided in 'Section 1.3.2: Search request with M-SEARCH' detailed in [[!UPNP-DEVICEARCH11]].
-        </p>
-        <p>
-          The user agent MUST issue all <a title="search request for UPnP root devices">search requests for UPnP root
-          devices</a> with a HTTP request line equal to <code>M-SEARCH * HTTP/1.1</code>, with a HOST header equal to
-          the reserved multicast address and port of <code>239.255.255.250:1900</code> and a MAN header equal to
-          <code>ssdp:discover</code>. The <a>user agent</a> must also send an ST header with this HTTP request equal to
-          the String value of <code>ssdp:all</code> or <code>upnp:rootdevice</code> or a single <a>valid service
-          type</a> token beginning with the String value <code>upnp:</code>. If a single <a>valid service type</a>
-          token beginning with the String value <code>upnp:</code> is to be used, the user agent MUST strip the leading
-          String <code>upnp:</code> before using this value in this HTTP request. The user-agent MUST also send an MX
-          header equal to a <dfn>maximum UPnP advertisement response wait time</dfn> value between <code>1</code> and
-          <code>5</code> seconds with this HTTP request.
-        </p>
-        <p>
-          The user agent MUST listen for any incoming responses to any <a>search request for UPnP root devices</a>.
-        </p>
-        <p>
-          For each <dfn>HTTP Response</dfn> following an initial <a>search request for UPnP root devices</a> sent on a
-          <a>standard UPnP address and port</a> the user agent MUST run the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the <a>HTTP Response</a> is not a HTTP 200 OK response then this response is invalid and the user
-          agent MUST discard this response, abort any remaining steps and return. The user agent MAY issue a new
-          <a>search request for UPnP root devices</a> as a result of this error occurring.
-          </li>
-          <li>If the <a>maximum UPnP advertisement response wait time</a> has been exceeded since the initial <a>search
-          request for UPnP root devices</a> was sent then the <a>HTTP Response</a> is invalid and the user agent MUST
-          discard this response, abort any remaining steps and return. The user agent MAY stop listening for responses
-          from the current <a>search request for UPnP root devices</a> as a result of this error occurring. Equally,
-          the user agent MAY issue a new <a>search request for UPnP root devices</a> as a result of this error
-          occurring.
-          </li>
-          <li>Let <var>ssdp device</var> be an Object with a property for each HTTP header received in the <a>HTTP
-          Response</a>, with each key being the name of a HTTP response header and each value being that HTTP response
-          header's value.
-          </li>
-          <li>If <var>ssdp device</var> does not contain at least one <var>CACHE-CONTROL</var> entry, at least one
-          <var>USN</var> entry, at least one <var>ST</var> entry and at least one <var>LOCATION</var> entry then the
-          <a>HTTP Response</a> is invalid and the <a>user agent</a> MUST discard this response, abort any remaining
-          steps and return.
-          </li>
-          <li>The user agent MUST run the rule for <a>obtaining a UPnP Device Description File</a> passing in the first
-          occurrence of <var>LOCATION</var> from <var>ssdp device</var> as the <var>device descriptor URL</var>
-          argument and the first occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device
-          identifier</var> argument and the first occurrence of <var>CACHE-CONTROL</var> from <var>ssdp device</var>
-          (minus the leading string of <code>max-age=</code>) as the <var>device expiry</var> argument.
-          </li>
-        </ol>
-        <p>
-          The user agent MUST listen for incoming requests on the <dfn>standard UPnP address and port</dfn> on all
-          current local network interface addresses with the port <code>1900</code>.
-        </p>
-        <p>
-          For each <dfn>HTTP Request</dfn> received on a <a>standard UPnP address and port</a> the user agent MUST run
-          the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the <a>HTTP Request</a> is not a HTTP NOTIFY request then it is not a valid UPnP Request and the user
-          agent MUST discard this request, abort any remaining steps and return.
-          </li>
-          <li>Let <var>ssdp device</var> be an Object with a property for each HTTP header received in the <a>HTTP
-          Request</a>, with each key being the name of a HTTP header and each value being that HTTP header's value.
-          </li>
-          <li>If <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:alive</code> and the <a>HTTP
-          Request</a> does not contain at least one <var>CACHE-CONTROL</var> entry, at least one <var>USN</var> entry,
-          at least one <var>NT</var> entry, at least one <var>NTS</var> entry and at least one <var>LOCATION</var>
-          entry, then the <a>user agent</a> MUST discard this request, abort any remaining steps and return.
-          </li>
-          <li>If <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:alive</code> then the user agent
-          MUST run the rule for <a>obtaining a UPnP Device Description File</a> passing in the first occurrence of
-          <var>LOCATION</var> from <var>ssdp device</var> as the <var>device descriptor URL</var> argument and the
-          first occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device identifier</var> argument
-          and the first occurrence of <var>CACHE-CONTROL</var> from <var>ssdp device</var> (minus the leading string of
-          <code>max-age=</code>) as the <var>device expiry</var>.<br>
-            <br>
-            Otherwise, if <var>ssdp device</var>'s <var>NTS</var> entry is equal to <code>ssdp:byebye</code> then the
-            user agent MUST run the rule for <a>removing all services from a registered UPnP Device</a> passing in the
-            first occurrence of <var>USN</var> from <var>ssdp device</var> as the <var>device identifier</var>
-            argument.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn>obtaining a UPnP Device Description File</dfn> is the process of obtaining the contents of
-          a standard UPnP Device Description [[!UPNP-DEVICEARCH11]] from a URL-based resource. This rule takes three
-          arguments - <var>device descriptor URL</var>, <var>device identifier</var> and <var>device expiry</var> - and
-          when called the user agent MUST run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>device descriptor file</var> contain the contents of the file located at the URL provided in
-          <var>device descriptor URL</var> obtained according to the rules defined in 'Section 2.11: Retrieving a
-          description using HTTP' in [[!UPNP-DEVICEARCH11]].
-          </li>
-          <li>If the value provided in <var>device descriptor URL</var> cannot be resolved as a reachable URL on the
-          current network or the <var>device descriptor file</var> remains empty then it is invalid and the <a>user
-          agent</a> MUST abort any remaining steps and return.
-          </li>
-          <li>Run the rule for <a>processing a UPnP Device Description File</a>, passing in the current <var>device
-          descriptor file</var>, <var>device identifier</var> and <var>device expiry</var> arguments.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn>processing a UPnP Device Description File</dfn> is the process of parsing the contents of a
-          standard UPnP Device Description [[!UPNP-DEVICEARCH11]] and registering the UPnP services contained therein
-          within the <a>list of available service records</a>.
-        </p>
-        <p>
-          The rule for <a>processing a UPnP Device Description File</a> takes three arguments - <var>device descriptor
-          file</var>, <var>device identifier</var> and <var>device expiry</var> - and when called the user agent MUST
-          run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>advertised services</var> be a list of all advertised services obtained from the <var>device
-          descriptor file</var> containing the value of the first occurrence of the <code>&lt;serviceList&gt;</code>
-          element as it is defined in 'Section 2.3: Device Description' in [[!UPNP-DEVICEARCH11]].
-          </li>
-          <li>For each <code>&lt;service&gt;</code> element - known as an <var>advertised service</var> - in
-          <var>advertised services</var> run the following steps:
-            <ol class="rule">
-              <li>Let <var>network service record</var> be a new Object consisting of the following empty properties:
-              <code>id</code>, <code>deviceId</code>, <code>name</code>, <code>type</code>, <code>url</code>,
-              <code>eventsUrl</code>, <code>config</code>, <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the concatenated string value of
-              the first occurrence of the <code>&lt;UDN&gt;</code> element in the <var>device descriptor file</var>
-              with the <var>advertised service</var>'s <code>&lt;serviceId&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>deviceId</code> property to the value of <var>device
-              identifier</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;serviceId&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to the concatenation of the string
-              <code>upnp:</code> followed by the string value of the first occurrence of the <var>advertised
-              service</var>'s <code>&lt;serviceType&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;controlURL&gt;</code> sub-element.
-              </li>
-              <li>Set <var>network service record</var>'s <code>config</code> property to the string value of the
-              contents of the first occurrence of the <code>&lt;device&gt;</code> element in the <var>device descriptor
-              file</var>.
-              </li>
-              <li>If <var>advertised service</var>'s <code>&lt;eventSubURL&gt;</code> sub-element is not empty, then
-              set <var>network service record</var>'s <code>eventsUrl</code> property to the string value of the first
-              occurrence of the <var>advertised service</var>'s <code>&lt;eventSubURL&gt;</code> sub-element.
-              Otherwise, do not set <var>network service record</var>'s <code>eventsUrl</code> property.
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus the value of <var>device expiry</var>.
-              </li>
-              <li>Run the general rule for <a>adding an available service</a>, passing in the current <var>network
-              service record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-          <li>If <var>device descriptor file</var> contains a <code>&lt;deviceList&gt;</code> element then for each
-          <code>&lt;device&gt;</code> element within <code>&lt;deviceList&gt;</code> - herein known as an <var>embedded
-          device descriptor file</var> - the user agent MUST run the rule for <a>processing a UPnP Device Description
-          File</a>, passing in the current <var>embedded device descriptor file</var> as the <var>device descriptor
-          file</var> argument, along with the current <var>device identifier</var> and <var>device expiry</var>
-          arguments.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn>removing all services from a registered UPnP Device</dfn> is the process of removing all
-          services associated with a device from the <a>list of available service records</a> that has left the user's
-          current network or has otherwise timed out or expired. This rule takes one argument, <var>device
-          identifier</var>, and consists of running the following steps:
-        </p>
-        <ol class="rule">
-          <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
-          the following sub-steps:
-            <ol class="rule">
-              <li>If the <var>existing service record</var>'s <code>deviceId</code> property does not match <var>device
-              identifier</var> then skip any remaining sub-steps for the current <var>existing service record</var> and
-              continue at the next available <var>existing service record</var>.
-              </li>
-              <li>Run the general rule for <a>removing an available service</a> passing in <var>existing service
-              record</var>'s <code>id</code> property as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-        <p>
-          When the <a>user agent</a> is to <dfn>setup a UPnP Events Subscription</dfn>, it is to run the following
-          steps with the current <var>network service record</var> object as defined in 'Section 4.1.2: SUBSCRIBE with
-          NT and CALLBACK' in [[!UPNP-DEVICEARCH11]]:
-        </p>
-        <ol class="rule">
-          <li>If <var>network service record</var>'s <code>eventsUrl</code> property is empty then the <a>user
-          agent</a> MUST abort these steps.
-          </li>
-          <li>Let <var>callback URL</var> be the value of creating a new <a>user-agent generated callback url</a>.
-          </li>
-          <li>Send a HTTP SUBSCRIBE request with a <em>NT</em> header with a string value of <code>upnp:event</code>, a
-          <em>TIMEOUT</em> header with a user-agent defined timeout value (in the form <code>Second-XX</code> where
-          <code>XX</code> is the user-agent defined timeout value in seconds) and a <em>CALLBACK</em> header with a
-          string value of <var>callback URL</var> towards the <var>network service record</var>'s
-          <code>eventsUrl</code> property.
-          </li>
-          <li>If a non-200 OK response is received from the HTTP SUBSCRIBE request then the <a>user agent</a> MUST
-          abort these steps.
-          </li>
-          <li>On receiving a valid 200 OK response, run the following steps:
-            <ol class="rule">
-              <li>Let <var>callback ID</var> equal the string value of the first included <em>SID</em> header, if it
-              exists.
-              </li>
-              <li>Let <var>timeout date</var> equal the sum of the current UTC date value plus the integer value of the
-              first included <em>TIMEOUT</em> header (minus the leading string of <code>Second-</code>), if it exists.
-              </li>
-              <li>Run the following steps asynchronously and continue to the step labeled <em>listen</em> below.
-              </li>
-              <li>
-                <em>Refresh Subscription</em>: Run the following steps at a set interval (X) within the <a>user
-                agent</a>:
-                <ol class="rule">
-                  <li>Let <var>current date</var> equal the current UTC date.
-                  </li>
-                  <li>If <var>current date</var> is less than the <var>timeout date</var> then continue to the step
-                  labeled <em>refresh subscription</em> above.
-                  </li>
-                  <li>Send a HTTP SUBSCRIBE request with a <em>SID</em> header with the string value of <var>callback
-                  ID</var> and a user-agent defined <em>TIMEOUT</em> header (in the form <code>Second-XX</code> where
-                  <code>XX</code> is the user-agent defined timeout value in seconds) towards the <var>network service
-                  record</var>'s <code>eventsUrl</code> property.
-                  </li>
-                  <li>On receiving a valid 200 OK, update <var>callback ID</var> with the string value of the first
-                  included <em>SID</em> header and set <var>timeout date</var> to the sum of the current UTC date value
-                  plus the integer value of the first included <em>TIMEOUT</em> header (minus the leading string of
-                  <code>Second-</code>), if it exists. If the current date is greater than or equal to <var>timeout
-                  date</var> then the <a>user agent</a> SHOULD continue from the step labeled <em>refresh
-                  subscription</em> above. For all non 200 OK responses the <a>user agent</a> SHOULD continue from the
-                  step labeled <em>refresh subscription</em> above.
-                  </li>
-                </ol>
-              </li>
-              <li>
-                <em>Listen</em>: For each HTTP NOTIFY request received at the <var>callback URL</var> the <a>user
-                agent</a> is to run the following steps:
-                <ol class="rule">
-                  <li>Let <var>content clone</var> be the result of obtaining the message body of the HTTP NOTIFY
-                  request. If <var>content clone</var> is empty, then the <a>user agent</a> MUST abort these steps.
-                  </li>
-                  <li>Let <var>notification event</var> be a new simple event that uses the <a href=
-                  "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                        class="externalDFN"><code>Event</code></a> interface with the name <a href=
-                        "#event-notify"><code>notify</code></a>, which does not bubble, is not cancellable, and has no
-                        default action.
-                  </li>
-                  <li>Let the <code>data</code> attribute of <var>notification event</var> have the DOMString value of
-                  <var>content clone</var>.
-                  </li>
-                  <li>
-                    <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
-                        class="externalDFN">Queue a task</a> to dispatch <var>notification event</var> at the current
-                        <a><code>NetworkService</code></a> object.
-                  </li>
-                  <li>Return a HTTP 200 OK response to the sender of the HTTP NOTIFY request.
-                  </li>
-                </ol>
-              </li>
-            </ol>
-          </li>
-        </ol>
-        <p>
-          A <a>user agent</a> can <dfn>terminate an existing UPnP Events Subscription</dfn> at any time for a
-          <var>network service record</var> by sending an HTTP UNSUBSCRIBE request - as defined in 'Section 4.1.4:
-          Cancelling a subscription with UNSUBSCRIBE' in [[!UPNP-DEVICEARCH11]] - with a HOST header set to that
-          <var>active service</var>'s <code>eventsUrl</code> property and a SID header set to the <var>callback
-          ID</var> obtained when the initial <a>setup a UPnP Events Subscription</a> action occurred.
-        </p>
-      </section>
-      <section>
-        <h5>
-          Discovery and Launch Protocol (<abbr title="Discovery and Launch Protocol">DIAL</abbr>)
-        </h5>
-        <p>
-          A user agent that implements DIAL service discovery MUST issue a <dfn>search request for DIAL-enabled
-          devices</dfn> against the user's current local network according to the full normative text and timing
-          provided in 'Section 1.3.2: Search request with M-SEARCH' detailed in [[!UPNP-DEVICEARCH11]].
-        </p>
-        <p>
-          Let <var>dial version</var> be the version number specified in the <a>valid service type</a> token. Let
-          <var>dial search target</var> be the concatentation of the
-          <code>urn:dial-multiscreen-org:service:dial:</code> string constant with the <var>dial version</var>
-          (currently, <var>dial version</var> can only be <code>1</code>)
-        </p>
-        <p>
-          The user agent MUST issue all <a title="search request for DIAL-enabled devices">search requests for
-          DIAL-enabled devices</a> with a HTTP request line equal to <code>M-SEARCH * HTTP/1.1</code>, with a HOST
-          header equal to the reserved multicast address and port of <code>239.255.255.250:1900</code>, a MAN header
-          equal to <code>ssdp:discover</code>, an ST header equal to <var>dial search target</var> and a user-agent
-          defined MX header equal to a <dfn>maximum DIAL advertisement response wait time</dfn> value between
-          <code>1</code> and <code>5</code> seconds.
-        </p>
-        <p>
-          The user agent MUST listen for any incoming responses to a <a>search request for DIAL-enabled devices</a>.
-        </p>
-        <p>
-          For each HTTP Response following an initial <a>search request for DIAL-enabled devices</a> sent on a
-          <a>standard UPnP address and port</a> the user agent MUST run the following steps:
-        </p>
-        <ol class="rule">
-          <li>If the HTTP Response is not a HTTP 200 OK response then this response is invalid and the user agent MUST
-          discard this response, abort any remaining steps and return. The user agent MAY issue a new <a>search request
-          for DIAL-enabled devices</a> as a result of this error occurring.
-          </li>
-          <li>If the <a>maximum DIAL advertisement response wait time</a> has been exceeded since the initial <a>search
-          request for DIAL-enabled devices</a> was sent then the <a>HTTP Response</a> is invalid and the user agent
-          MUST discard this response, abort any remaining steps and return. The user agent MAY stop listening for
-          responses from the current <a>search request for DIAL-enabled devices</a> as a result of this error
-          occurring. Equally, the user agent MAY issue a new <a>search request for DIAL-enabled devices</a> as a result
-          of this error occurring.
-          </li>
-          <li>Let <var>dial device</var> be an Object with a property for each HTTP header received in the <a>HTTP
-          Response</a>, with each key being the name of a HTTP response header and each value being that HTTP response
-          header's value.
-          </li>
-          <li>If <var>dial device</var> does not contain at least one <var>CACHE-CONTROL</var> entry, at least one
-          <var>USN</var> entry, at least one <var>ST</var> entry and at least one <var>LOCATION</var> entry or the
-          value of its <var>ST</var> entry is not <var>dial search target</var>, then the <a>HTTP Response</a> is
-          invalid and the <a>user agent</a> MUST discard this response, abort any remaining steps and return.
-          </li>
-          <li>The user agent MUST run the rule for <a>obtaining a UPnP Device Description File</a> passing in the first
-          occurrence of <var>LOCATION</var> from <var>dial device</var> as the <var>device descriptor URL</var>
-          argument and the first occurrence of <var>USN</var> from <var>dial device</var> as the <var>device
-          identifier</var> argument and the first occurrence of <var>CACHE-CONTROL</var> from <var>dial device</var>
-          (minus the leading string of <code>max-age=</code>) as the <var>device expiry</var> argument.
-          </li>
-        </ol>
-        <p>
-          The rule for <dfn>obtaining a DIAL Device Description File</dfn> is the process of obtaining the contents of
-          a standard UPnP Device Description [[!UPNP-DEVICEARCH11]] from a URL-based resource. This rule takes three
-          arguments - <var>device descriptor URL</var>, <var>device identifier</var> and <var>device expiry</var> - and
-          when called the user agent MUST run the following steps:
-        </p>
-        <ol class="rule">
-          <li>Let <var>device descriptor file</var> contain the contents of the file located at the URL provided in
-          <var>device descriptor URL</var> obtained according to the rules defined in 'Section 2.11: Retrieving a
-          description using HTTP' in [[!UPNP-DEVICEARCH11]].
-          </li>
-          <li>Let <var>application url</var> be the value of the first occurrence of the <code>Application-URL</code>
-          response header field obtained according to the rules defined in 'Section 5.4: Device Description Response'
-          in [<a href="https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification">DIAL</a>]
-          </li>
-          <li>If the value provided in <var>device descriptor URL</var> cannot be resolved as a reachable URL on the
-          current network or the <var>device descriptor file</var> remains empty or <var>application url</var> is
-          undefined then it is invalid and the <a>user agent</a> MUST abort any remaining steps and return.
-          </li>
-          <li>Run the following steps to add the newly discovered DIAL service:
-            <ol class="rule">
-              <li>Let <var>network service record</var> be a new Object consisting of the following empty properties:
-              <code>id</code>, <code>deviceId</code>, <code>name</code>, <code>type</code>, <code>url</code>,
-              <code>expiryTimestamp</code>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>id</code> property to the first occurrence of the
-              <code>&lt;UDN&gt;</code> element in the <var>descriptor file</var> prefixed with the <code>dial:</code>
-              string constant
-              </li>
-              <li>Set <var>network service record</var>'s <code>deviceId</code> property to the value of <var>device
-              identifier</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>name</code> property to the string value of the first
-              occurrence of the <code>&lt;friendlyName&gt;</code> element in the <var>descriptor file</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>type</code> property to <var>dial search target</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>url</code> property to the string value of the
-              <var>application url</var>.
-              </li>
-              <li>Set <var>network service record</var>'s <code>expiryTimestamp</code> property to the value of the
-              current date, in UTC timestamp format, plus the value of <var>device expiry</var>.
-              </li>
-              <li>Run the general rule for <a>adding an available service</a>, passing in the current <var>network
-              service record</var> as the only argument.
-              </li>
-            </ol>
-          </li>
-        </ol>
-      </section>
-      <section>
-        <h3>
-          Network Topology Monitoring
-        </h3>
-        <div>
-          <p>
-            When the <a>user agent</a> detects that the user has dropped from a connected network then, for each
-            <var>existing service record</var> in the <a>list of available service records</a> discovered via that
-            network connection, the <a>user agent</a> MUST run the general rule for <a>removing an available
-            service</a> passing in each <var>existing service record</var>'s <code>id</code> property as the only
-            argument for each call.
-          </p>
-          <p>
-            When the <a>user agent</a> detects that the user has connected to a new network or reconnected to an
-            existing network, then it SHOULD restart its discovery mechanisms as defined in the <a href=
-            "#service-discovery">Service Discovery</a> section of this specification, maintaining the existing <a>list
-            of active service managers</a> currently in use.
-          </p>
-        </div>
-      </section>
-    </section>
-    <section>
-      <h3>
-        Events Summary
-      </h3>
-      <p>
-        The following events are dispatched on the <a href="#networkservices"><code>NetworkServices</code></a> and/or
-        <a href="#networkservice"><code>NetworkService</code></a> objects:
-      </p>
-      <table border="1">
-        <thead>
-          <tr>
-            <th>
-              <span>Event name</span>
-            </th>
-            <th>
-              <span>Interface</span>
-            </th>
-            <th>
-              <span>Dispatched when...</span>
-            </th>
-          </tr>
-        </thead>
-        <tbody>
-          <tr>
-            <td>
-              <dfn id="event-servicefound"><code>servicefound</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a>new service</a> that matches one of the <a title="valid service type">requested type tokens</a>
-              is found in the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-servicelost"><code>servicelost</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When an <a>existing service</a> that matches one of the <a title="valid service type">requested type
-              tokens</a> gracefully leaves or expires from the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-available"><code>available</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a>current service</a> renews its service registration within the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-unavailable"><code>unavailable</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a <a>current service</a> gracefully leaves or otherwise expires from the current network.
-            </td>
-          </tr>
-          <tr>
-            <td>
-              <dfn id="event-notify"><code>notify</code></dfn>
-            </td>
-            <td>
-              <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
-                  class="externalDFN"><code>Event</code></a>
-            </td>
-            <td>
-              When a valid UPnP Events Subscription Message is received on a <a>user-agent generated callback url</a>
-              for a <a>current service</a>. This event never fires for Zeroconf-based services.
-            </td>
-          </tr>
-        </tbody>
-      </table>
-    </section>
-    <section>
-      <h3>
-        Garbage collection
-      </h3>
-      <p>
-        There is an <dfn>implied strong reference</dfn> from any IDL attribute in this API that returns a pre-existing
-        object to that object.
-      </p>
-      <p class="note">
-        For example, if a <a><code>NetworkServices</code></a> object has one or more <a>indexed properties</a> attached
-        to it then there is a strong reference from that <a><code>NetworkServices</code></a> object toward each of its
-        <a>indexed properties</a>.
-      </p>
-      <p>
-        If a <a>user agent</a> is to <dfn>make disappear</dfn> a <a><code>NetworkServices</code></a> object (this
-        happens when a <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#document"
-           class="externalDFN"><code>Document</code></a> object goes away), the <a>user agent</a> MUST remove this
-           object from the <a>list of active service managers</a>.
-      </p>
-    </section>
-    <section>
-      <h3>
-        Use Cases and Requirements
-      </h3>
-      <p>
-        This section covers what the requirements are for this API, as well as illustrates some use cases.
-      </p>
-      <ul class="rule">
-        <li>Once a user has given permission, user agents should provide the ability for Web pages to communicate
-        directly with a Local-networked Service.
-          <ul class="rule">
-            <li>Example: A web-based TV remote control. A Web page wants to control the current user's TV, changing the
-            programming shown or increasing/decreasing/muting the volume of the Local-networked Device. The Web page
-            requests a service type that is known to be implemented by television sets to which it has the application
-            logic to communicate. Local devices providing the request service types are discovered and presented to the
-            user for authorization. The user selects one or more of the discovered television sets to be accessible to
-            the current Web page and then clicks 'Share'. The Web page can now communicate directly with the
-            user-authorized Local-networked services.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should be able to communicate with Local-networked Services using the messaging channel supported
-        by those Devices.
-          <ul class="rule">
-            <li>Example: A Web page advertises that it is capable of controlling multiple Home Media Servers. The user
-            can select their Home Media Server type from a drop-down list, at which point the Web page sends a request
-            to the user agent to connect with the associated service type of the Home Media Server. The Media Server
-            selected implements a Web Socket channel for bi-directional service communication and so the Web page opens
-            a web socket to the requested Media Server and can communicate as required via that appropriate channel.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should be able to communicate with Local-networked Services using the messaging format supported
-        by those Devices.
-          <ul class="rule">
-            <li>Example: A Web page advertises that it is capable of interacting with and controlling multiple types of
-            Home Media Server. The user can select their Home Media Server type from a drop-down list or known Media
-            Servers, at which point the Web page sends a request to the user agent to connect with the associated
-            service type (and, optionally, the associated event type) of the Home Media Server. The communication
-            protocols supported by Home Media Servers typically vary between UPnP, JSON-RPC, Protocol Buffers or other
-            messaging formats depending on the Home Media Server requested. The Web page is able to communicate with
-            the user-selected Home Media Server in the messaging format supported by that Device, which, in this
-            example is a simple key/value pair text format.
-            </li>
-          </ul>
-        </li>
-        <li>Web pages should not be able to communicate with Local-networked Services that have not been authorized by
-        the user thereby maintaining the user's privacy.
-          <ul class="rule">
-            <li>Example: A Web page requests access to one type of Local-networked service. The user authorizes access
-            to that particular service. Other services running on that same device, and on other devices within the
-            network, should not be accessible to the current Web page.
-            </li>
-          </ul>
-        </li>
-        <li>A user should be able to share one or more Local-networked Services based on a particular service type
-        request from a Web page.
-          <ul class="rule">
-            <li>Example: A Web page is capable of interacting with a specific profile of Local-networked Service. As
-            such, it makes a request to the user agent to access those services, of which multiple matches are found.
-            The user is capable of selecting one or more of the discovered services to share with the Web page. The Web
-            page can then implement a drag-and-drop interface for the user to drag specific actions on to one or more
-            of the authorized Local-networked Services.
-            </li>
-          </ul>
-        </li>
-        <li>User agents should provide an API exposed to script that exposes the features above. The user is notified
-        by UI anytime interaction with Local-networked Services is requested, giving the user full ability to cancel or
-        abort the transaction. The user selects the Local-networked Services to be connected to the current Web page,
-        and can cancel these at any time. No invocations to these APIs occur silently without user intervention.
-        </li>
-      </ul>
-    </section>
-    <section class="informative appendix">
-      <h3>
-        Examples
-      </h3>
-      <div class="example">
-        <p>
-          This sample code exposes a button. When clicked, this button is disabled and the user is prompted to offer a
-          network service. The user may also select multiple network services. When the user has authorized a network
-          service to be connected to the web page then the web page issues a simple command to get a list of all the
-          albums stored on the connected media player service.
-        </p>
-        <p>
-          The button is re-enabled only when the connected network service disconnects for whatever reason (the service
-          becomes unavailable on the network, the user disconnects from their current network or the user revokes
-          access to the service from the current web page). At this point the user can re-click the button to select a
-          new network service to connect to the web page and the above steps are repeated.
-        </p>
-        <p>
-          The provided service type identifier and service interaction used in this example is based on the
-          well-defined service type and messaging format supported by the <a href="http://xbmc.org/about/">XBMC Media
-          Server</a>.
-        </p>
-        <hr>
-        <pre class="highlight">
-&lt;input type="button" value="Start" onclick="start()" id="startBtn"/&gt;
-&lt;div id="debugconsole"&gt;&lt;/div&gt;
-
-&lt;script&gt;
- var startBtn = document.getElementById('startBtn'),
-     debug = document.getElementById('debugconsole');
-
- function start() {
-   if(navigator.getNetworkServices) {
-      navigator.getNetworkServices('zeroconf:_xbmc-jsonrpc._tcp').then(gotXBMCService).catch(error);
-      startBtn.disabled = true;
-   } else {
-      debug.innerHTML += "&lt;br&gt;Service Discovery not supported!";
-   }
- }
-
- function gotXBMCService(services) {
-
-// Listen for service disconnect messages
-
-   services[0].addEventListener('unavailable', function ( e ) {
-       debug.innerHTML += "&lt;br&gt;" + services[0].name + " disconnected.";
-       startBtn.disabled = false;
-   }, false);
-
-// Send a service message to get albums list (and process the service response)
-
-   var svcXhr = new XMLHttpRequest();
-   svcXhr.open("POST", services[0].url + "/getAlbums"); // services[0].url and its sub-resources are
-                                                        // available for cross-site XHR use.
-
-   svcXhr.setRequestHeader('Content-Type', 'application/json-rpc');
-
-   svcXhr.addEventListener('readystatechange', function ( response ) {
-     if( response.readyState != 4 || response.status != 200 )
-        return;
-     debug.innerHTML += "&lt;br&gt;" + services[0].name + " response received: ";
-     debug.textContent += JSON.parse(response.responseText);
-   }, false);
-
-   var svcMsg = [
-     { "jsonrpc": "2.0", "method": "AudioLibrary.GetAlbums", "params": { "genreid": -1,
-         "artistid": -1, "start": -1, "end": -1 }, "id": "1" }
-   ];
-
-   svcXhr.send(JSON.stringify(svcMsg));
-   debug.innerHTML += "&lt;br&gt;" + services[0].name + " request sent: ";
-   debug.textContent += JSON.stringify(svcMsg);
-
- }
-
- function error( err ) {
-   debug.innerHTML += "&lt;br&gt;An error occurred obtaining a local network service.";
-   startBtn.disabled = false;
- }
-&lt;/script&gt;
-</pre>
-      </div>
-      <div class="example">
-        <p>
-          This sample exposes a drop-down list containing a number of common Home-based audio devices. When the user
-          selects an audio device from the list provided, they are prompted to authorize a network service based on the
-          service type requested. The user may also select multiple network services matching the selected service
-          type. In this example, the user selects their make as being <var>Sony</var> and their model as being
-          <var>Bravia S1000</var> from which the Web page can derive a service type
-          (<var>urn:schemas-upnp-org:service:RenderingControl:1</var>).<br>
-          <br>
-          Once the user has authorized the device, the web page sends a simple mute command according to the messaging
-          format supported by the device.
-        </p>
-        <hr>
-        <pre class="highlight">
-&lt;select name="make" id="make"&gt;
-  &lt;option selected="selected" disabled="disabled"&gt;Select make&lt;/option&gt;
-  &lt;option&gt;Sony&lt;/option&gt;
-  &lt;option&gt;Philips&lt;/option&gt;
-  &lt;option&gt;Alba&lt;/option&gt;
-&lt;/select&gt;
-&lt;select name="model" id="model"&gt;&lt;/select&gt;
-&lt;div id="debugconsole"&gt;&lt;/div&gt;
-
-&lt;script&gt;
-  var debug = document.getElementById('debugconsole');
-
-  var models = {
-    "Sony": [
-      {"name": "Bravia TV S1000", "type": "upnp", "service": "urn:schemas-upnp-org:service:RenderingControl:1" },
-      {"name": "Bravia TV S2000", "type": "zeroconf", "service": "_mediarenderer._http._tcp" },
-      {"name": "HiFi WD10", "type": "upnp", "service": "urn:schemas-upnp-org:service:RenderingControl:1" }
-    ],
-    "Philips": [ /* ... */ ],
-    "Alba": [ /* ... */ ]
-  };
-
-  var makeEl = document.getElementById("make"),
-      modelEl = document.getElementById("model");
-
-  makeEl.addEventListener('change', function() {
-    modelEl.innerHTML = ""; // reset
-    var defaultOption = document.createElement("option");
-    defaultOption.textContent = "Select model";
-    defaultOption.setAttribute("disabled", "disabled");
-    defaultOption.setAttribute("selected", "selected");
-    modelEl.appendChild(defaultOption);
-    for(var i = 0, l = models[makeEl.value].length; i &lt; l; i++) {
-      var option = document.createElement("option");
-      option.textContent = models[makeEl.value][i]["name"];
-      option.setAttribute("value", models[makeEl.value][i]["type"] + ":" + models[makeEl.value][i]["service"]);
-      modelEl.appendChild(option);
-    }
-  }, false);
-
-  modelEl.addEventListener('change', function() {
-    if(navigator.getNetworkServices &amp;&amp;
-         modelEl.value == "upnp:urn:schemas-upnp-org:service:RenderingControl:1") {
-      var servicesPromise = navigator.getNetworkServices(modelEl.value).then(successCallback, errorCallback);
-    } else if (modelEl.value == "zeroconf:_mediarenderer._http._tcp") {
-      debug.innerHTML += "&lt;br&gt;Service type is not implemented by this application.";
-    } else {
-      debug.innerHTML += "&lt;br&gt;Service Discovery is not supported!";
-    }
-  }, false);
-&lt;/script&gt;
-
-&lt;script&gt;
-  function successCallback( services ) {
-
-  // Listen for service push notification messages
-
-    services[0].addEventListener('notify', function ( msg ) {
-         debug.innerHTML += "&lt;br&gt;" + services[0].name + " event received: ";
-         debug.textContent += msg.data;
-    }, false);
-
- // Send a control signal to mute the service audio
-
-    var svcXhr = new XMLHttpRequest();
-    svcXhr.open("POST", services[0].url); // services[0].url and its sub-resources are
-                                          // available for cross-site XHR use.
-
-    svcXhr.setRequestHeader('SOAPAction', 'urn:schemas-upnp-org:service:RenderingControl:1#SetMute');
-    svcXhr.setRequestHeader('Content-Type', 'text/xml; charset="utf-8";');
-
-    svcXhr.onreadystatechange = function ( response ) {
-      if( response.readyState != 4 || response.status != 200 )
-        return;
-      debug.innerHTML += "&lt;br&gt;" + services[0].name + " response received: ";
-      debug.textContent += response.responseXML;
-    }
-
-    // Service messaging to mute the provided service
-    var svcMsg = '&lt;?xml version="1.0" encoding="utf-8"?&gt;' +
-                 '&lt;s:Envelope s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" ' +
-                   'xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;' +
-                   '&lt;s:Body&gt;' +
-                     '&lt;u:SetMute xmlns:u="urn:schemas-upnp-org:service:RenderingControl:1"&gt;' +
-                       '&lt;InstanceID&gt;0&lt;/InstanceID&gt;' +
-                       '&lt;Channel&gt;Master&lt;/Channel&gt;' +
-                       '&lt;DesiredMute&gt;true&lt;/DesiredMute&gt;' +
-                     '&lt;/u:SetMute&gt;' +
-                   '&lt;/s:Body&gt;' +
-                 '&lt;/s:Envelope&gt;';
-
-    svcXhr.send(svcMsg);
-    debug.innerHTML += "&lt;br&gt;" + services[0].name + " request sent: ";
-    debug.textContent += svcMsg;
-  }
-
-  function errorCallback( error ) {
-    debug.innerHTML += "&lt;br&gt;An error occurred: " + error.name;
-  }
-&lt;/script&gt;
-</pre>
-      </div>
-    </section>
-    <section>
-      <h3>
-        Acknowledgements
-      </h3>
-      <p>
-        Thanks are expressed by the editor to the following individuals for their feedback on this specification to
-        date (in alphabetical order):<br>
-        <br>
-        Adam Barth, Gar Bergstedt, Robin Berjon, Lars-Erik Bolstad, Marcos Caceres, Cathy Chan, Daniel Danciu,
-        Jean-Claude Dufourd, Youenn Fablot, Mark Foltz, Dominique Hazael-Massieux, Frederick Hirsch, Tatsuya Igarashi,
-        Hari G Kumar, Bob Lund, Giuseppe Pascale, Marcin Simonides, Clarke Stevens, Christian Söderström, Mark Vickers.
-      </p>
-      <p>
-        Thanks are also expressed by the editor to the following organizations and groups for their support in
-        producing this specification to date (in alphabetical order):<br>
-        <br>
-        CableLabs, Google Inc., Opera Software ASA, Nokia Corp., Télécom ParisTech, W3C Device APIs Working Group, W3C
-        Web and TV Interest Group.
+        <strong>Work on this document has been discontinued and it should not be referenced or used as a basis for implementation.</strong> The <a href="https://www.w3.org/TR/presentation-api/">Presentation API</a> and the <a href="https://www.w3.org/TR/remote-playback/">Remote Playback API</a> address a subset of the use cases this API attempted to address.
       </p>
     </section>
   </body>
Received on Thursday, 12 January 2017 13:24:15 UTC

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