- From: Manu Sporny via cvs-syncmail <cvsmail@w3.org>
- Date: Thu, 08 Oct 2009 03:47:42 +0000
- To: public-html-commits@w3.org
Update of /sources/public/html5/rdfa
In directory hutz:/tmp/cvs-serv18513
Modified Files:
Overview.html
Log Message:
Cleaned up HTML+RDFa spec W3C PubRules issues.
Index: Overview.html
===================================================================
RCS file: /sources/public/html5/rdfa/Overview.html,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -d -r1.7 -r1.8
--- Overview.html 17 Sep 2009 23:07:28 -0000 1.7
+++ Overview.html 8 Oct 2009 03:47:39 -0000 1.8
@@ -1,4 +1,4 @@
-<!DOCTYPE html><!-- when publishing, change bits marked ZZZ --><html lang=en-US-x-Hixie><head><title>HTML+RDFa</title><style type=text/css>
+<!DOCTYPE html><!-- when publishing, change bits marked ZZZ --><html lang=en><head><title>HTML+RDFa</title><style type=text/css>
pre { margin-left: 2em; white-space: pre-wrap; }
h2 { margin: 3em 0 1em 0; }
h3 { margin: 2.5em 0 1em 0; }
@@ -173,8 +173,7 @@
ul.domTree .t7 code, .domTree .t8 code { color: green; }
ul.domTree .t10 code { color: teal; }
- </style><link href=data:text/css, rel=stylesheet title="Complete specification" type=text/css><link href=data:text/css,.impl%20{%20display:%20none;%20} rel="alternate stylesheet" title="Author documentation only"><link href=data:text/css,.impl%20{%20background:%20%23FFEEEE;%20} rel="alternate stylesheet" title="Highlight implementation requirements"><link href=http://www.w3.org/StyleSheets/TR/W3C-ED rel=stylesheet type=text/css><!-- ZZZ ED vs WD --></head><body>
- <div class=head>
+ </style><link href=data:text/css, rel=stylesheet title="Complete specification" type=text/css><link href=data:text/css,.impl%20{%20display:%20none;%20} rel="alternate stylesheet" title="Author documentation only"><link href=data:text/css,.impl%20{%20background:%20%23FFEEEE;%20} rel="alternate stylesheet" title="Highlight implementation requirements"><link href=http://www.w3.org/StyleSheets/TR/W3C-WD rel=stylesheet type=text/css><!-- ZZZ ED vs WD --></head><body><div class=head>
<p>
<a href=http://www.w3.org/><img alt=W3C height=48 src=http://www.w3.org/Icons/w3c_home width=72></a>
</p>
@@ -182,31 +181,35 @@
<h2 class="no-num no-toc" id=a-mechanism-for-embedding-rdf-in-html>
A mechanism for embedding RDF in HTML
</h2>
- <h2 class="no-num no-toc" id=editor-s-draft-date-15-September-2009>Editor's Draft 15 September 2009</h2>
+ <h2 class="no-num no-toc" id=editor-s-draft-date-07-October-2009>W3C Working Draft 07 October 2009</h2>
<!--:ZZZ-->
<dl><!-- ZZZ: update the month/day (twice), (un)comment out
<dt>This Version:</dt>
<dd><a href="http://www.w3.org/TR/2009/WD-html5-20090423/">http://www.w3.org/TR/2009/WD-html5-20090423/</a></dd>
- :ZZZ --><dt>Latest Editor's Draft:</dt>
- <dd><a href=http://html5.digitalbazaar.com/specs/rdfa.html>http://html5.digitalbazaar.com/specs/rdfa.html</a></dd>
- <dt>
- Contributors (alphabetical order):
+ :ZZZ --><dt>This Version</dt>
+ <dd><a href=http://www.w3.org/TR/2009/WD-rdfa-in-html-20091007/>http://www.w3.org/TR/2009/WD-rdfa-in-html-20091007/</a></dd>
+ <dt>Latest Version</dt>
+ <dd><a href=http://www.w3.org/TR/rdfa-in-html/>http://www.w3.org/TR/rdfa-in-html/</a></dd>
+ <dt>Previous Version</dt>
+ <dd><a href=http://www.w3.org/TR/2009/WD-rdfa-in-html-20091007/>http://www.w3.org/TR/2009/WD-rdfa-in-html-20091007/</a>
+ </dd><dt>
+ Authors (alphabetical order):
</dt>
<dd>
- Ben Adida (Chair, Creative Commons)
+ Ben Adida (Chair, RDFa Task Force, Creative Commons)
</dd>
<dd>
- Mark Birbeck (Editor, RDFa Core and inventor of RDFa concept, Web
+ Mark Birbeck (Editor, XHTML+RDFa and inventor of RDFa concept, Web
Backplane Ltd.)
</dd>
<dd>
- Shane McCarron (Editor, RDFa Core, Applied Testing and Technology, Inc.)
+ Shane McCarron (Editor, XHTML+RDFa, Applied Testing and Technology, Inc.)
</dd>
<dd>
- Steven Pemberton (Chair, XHTML2, CWI)
+ Steven Pemberton (Chair, XHTML2 and RDFa Task Force member, CWI)
</dd>
<dd>
- <a href=mailto:msporny@digitalbazaar.com>Manu Sporny</a>, (Editor, HTML+RDFa, Digital Bazaar, Inc.)
+ <a href=mailto:msporny@digitalbazaar.com>Manu Sporny</a>, (Editor, HTML+RDFa and RDFa Task Force member, Digital Bazaar, Inc.)
</dd>
</dl><p class=copyright>
<a href=http://www.w3.org/Consortium/Legal/ipr-notice#Copyright>Copyright</a> © 2009 <a href=http://www.w3.org/><abbr title="World Wide Web
@@ -217,44 +220,29 @@
and <a href=http://www.w3.org/Consortium/Legal/copyright-documents>document use</a>
rules apply.
</p>
- </div>
- <hr class=top><h2 class="no-num no-toc" id=abstract>
+ </div><hr class=top><h2 class="no-num no-toc" id=abstract>
Abstract
- </h2>
- <p>
+ </h2><p>
This specification defines rules and guidelines for adapting the
RDF in XHTML: Syntax and Processing (RDFa) specification for use in the
HTML5 and XHTML5 members of the HTML family. The rules defined in this
document not only apply to HTML5 documents in non-XML and XML mode,
but also to HTML4 documents interpreted through the HTML5 parsing rules.
- </p>
- <h2 class="no-num no-toc" id=status-of-this-document>
+ </p><h2 class="no-num no-toc" id=status-of-this-document>
Status of this document
- </h2><!-- intro boilerplate (required) -->
- <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 W3C publications and the most recently formally published revision
- of this technical report can be found in the <a href=http://www.w3.org/TR/>W3C technical reports index</a> at
- http://www.w3.org/TR/.</em>
- </p>
- <p>
+ </h2><!-- intro boilerplate (required) --><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 W3C publications and the latest revision of this technical report can be found in the <a href=http://www.w3.org/TR/>W3C technical reports index</a> at http://www.w3.org/TR/.</em></p><p>
If you wish to make comments regarding this document, please send them to
<a href=mailto:public-rdf-in-xhtml-tf@w3.org>public-rdf-in-xhtml-tf@w3.org</a>
(<a href="mailto:public-rdf-in-xhtml-tf-request@w3.org?subject=subscribe">subscribe</a>,
<a href=http://lists.w3.org/Archives/Public/public-rdf-in-xhtml-tf/>archives</a>)
- </p>
- <!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST -->
- <!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- stability (required) -->
- <p>
+ </p><!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- stability (required) --><p>
Implementors should be aware that this specification is not stable.
<strong>Implementors who are not taking part in the discussions are likely
to find the specification changing out from under them in incompatible
ways.</strong> Vendors interested in implementing this specification
before it eventually reaches the Candidate Recommendation stage should
join the aforementioned mailing lists and take part in the discussions.
- </p><!-- not everyone agrees with html5 (requested before fpwd) -->
- <p>
+ </p><!-- not everyone agrees with html5 (requested before fpwd) --><p>Publication as a Working Draft does not imply endorsement by the W3C 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>
The publication of this document by the W3C as a W3C Working Draft does
not imply that all of the participants in the W3C HTML working group
endorse the contents of the specification. Indeed, for any section of the
@@ -262,28 +250,20 @@
of the W3C as a whole who object strongly to the current text, the
existence of the section at all, or the idea that the working group should
even spend time discussing the concept of that section.
- </p>
- <!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- version history or list of changes (required) -->
- <p>
+ </p><!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- version history or list of changes (required) --><p>
The latest stable version of the editor's draft of this specification is
- always available on <a href=http://dev.w3.org/html5/rdfa/rdfa-module.html>the W3C CVS server</a>.
- The <a href=http://dev.w3.org/html5/rdfa/rdfa>latest editor's working copy</a> (which may contain unfinished text in the process of
+ always available on <a href=http://dev.w3.org/html5/rdfa/>the W3C CVS server</a>.
+ The <a href=http://html5.digitalbazaar.com/specs/rdfa.html>latest editor's working copy</a> (which may contain unfinished text in the process of
being prepared) is also available.
- </p>
- <!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING LIST TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- status of document, group responsible (required) -->
- <p>
+ </p><!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING LIST TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- status of document, group responsible (required) --><p>
The W3C <a href=http://www.w3.org/html/wg/>HTML Working Group</a> is the
W3C working group responsible for this specification's progress along the
W3C Recommendation track.
- </p>
- <!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- context and rationale (required) -->
- <p>
+ </p><!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- UNDER NO CIRCUMSTANCES IS THE PRECEDING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- context and rationale (required) --><p>
This specification is an extension to the HTML5 language. All normative
content in the HTML5 specification, unless specifically overridden by this
specification, is intended to be the basis for this specification.
- </p>
- <!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- required patent boilerplate -->
- <p>
+ </p><!-- UNDER NO CIRCUMSTANCES IS THE FOLLOWING PARAGRAPH TO BE REMOVED OR EDITED WITHOUT TALKING TO IAN FIRST --><!-- required patent boilerplate --><p>
This document was produced by a group operating under the <a href=http://www.w3.org/Consortium/Patent-Policy-20040205/>5 February 2004 W3C
Patent Policy</a>. W3C maintains a <a href=http://www.w3.org/2004/01/pp-impl/40318/status rel=disclosure>public list of any patent disclosures</a> made in
connection with the deliverables of the group; that page also includes
@@ -291,9 +271,7 @@
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 W3C Patent Policy</a>.
- </p>
- <h2 class="no-num no-toc" id=contents>Table of contents</h2>
-
+ </p><h2 class="no-num no-toc" id=contents>Table of contents</h2>
<!--begin-toc-->
<ol class=toc>
<li><a href=#introduction><span class=secno>1 </span>Introduction</a>
@@ -331,24 +309,15 @@
</a>
<ol>
<li><a href=#the-rdfa-attributes-and-valid-values><span class=secno>5.1 </span>The RDFa Attributes and Valid Values</a></li>
- <li><a href=#the-profile-attribute-and-link-type><span class=secno>5.2 </span>The <code>profile</code> attribute and link type</a></li>
- <li><a href=#conformance-criteria-for-xmlns:-prefixed-attributes><span class=secno>5.3 </span>Conformance Criteria for <code>xmlns:</code>-Prefixed Attributes</a></li></ol></li></ol>
-<!--end-toc-->
- <hr><h2 id=introduction><span class=secno>1 </span>Introduction</h2><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p>
-
- <p>
+ <li><a href=#conformance-criteria-for-xmlns:-prefixed-attributes><span class=secno>5.2 </span>Conformance Criteria for <code>xmlns:</code>-Prefixed Attributes</a></li></ol></li>
+ <li><a href=#normative-references><span class=secno>6 </span>Normative References</a></li></ol>
+<!--end-toc--><hr><h2 id=introduction><span class=secno>1 </span>Introduction</h2><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p><p>
<em>This section is informative.</em>
- </p>
-
- <p>
+ </p><p>
Today's web is built predominantly for human consumption. Even as machine-readable data begins to permeate the web, it is typically distributed in a separate file, with a separate format, and very limited correspondence between the human and machine versions. As a result, web browsers can provide only minimal assistance to humans in parsing and processing web data: browsers only see presentation information. RDFa is intended to solve the problem of machine-readable data in HTML documents. RDFa provides a set of HTML attributes to augment visual data with machine-readable hints. Using RDFa, authors may turn their existing human-visible text and links into machine-readable data without repeating content.
- </p>
-
- <h3 id=history><span class=secno>1.1 </span>
+ </p><h3 id=history><span class=secno>1.1 </span>
History
- </h3><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p>
-
- <p>
+ </h3><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p><p>
In early 2004, Mark Birbeck published a document named
[<a href=http://www.w3.org/MarkUp/2004/02/xhtml-rdf.html>XHTML and RDF</a>]
via the XHTML2 Working Group wherein he laid the groundwork for what
@@ -371,37 +340,31 @@
document applied to XHTML, the attributes and rules were always
intended to operate across any tree-based structure containing attributes
on tree nodes (such as HTML4, SVG and ODF).
- </p>
- <p>
+ </p><p>
While RDFa was initially specified for use in XHTML, adoption by
a number of large organizations on the Web spurred RDFa's use in non-XHTML
languages. Its use in HTML4, before an official specification
was developed for those languages, caused concern regarding document
conformance.
- </p>
- <p>
+ </p><p>
Over the years, the members of the RDFa Task Force
[<a href=http://rdfa.info/>RDFaTF</a>] had discussed the possibility
of applying the same attributes and processing rules outlined in the
XHTML+RDFa specification to all HTML family documents. By design, the
possibility of a unified semantic data expression mechanism between all
HTML and XHTML family documents was squarely in the realm of possibility.
- </p>
- <p>
+ </p><p>
This section describes the modifications to the original XHTML+RDFa
specification that permit the use of RDFa in all HTML family documents.
By using the attributes and processing rules described in the
XHTML+RDFa specification and heeding the minor changes in this
section, authors can expect to generate markup that produces the same
semantic data output in HTML4, HTML5 and XHTML5.
- </p>
- <h2 id=parsing-model><span class=secno>2 </span>
+ </p><h2 id=parsing-model><span class=secno>2 </span>
Parsing Model
- </h2>
- <p>
+ </h2><p>
<em>This section is normative.</em>
- </p>
- <p>
+ </p><p>
<a href=http://www.w3.org/TR/rdfa-syntax/#sec_5.5.>Section 5.5: Sequence</a><a></a>,
of the
[<a href=http://www.w3.org/TR/rdfa-syntax/>XHTML+RDFa</a>] specification
@@ -411,8 +374,7 @@
in the XHTML+RDFa specification. The method of transformation was intended
to be defined in the implementation language, in this case, this section of
the HTML+RDFa specification.
- </p>
- <p>
+ </p><p>
The HTML5 and XHTML5 DOMs are each a super-set of the tree-based model
on which the RDFa processing rules operate. Therefore, a mapping mechanism
to translate from a DOM to a tree-model is not necessary.
@@ -420,12 +382,9 @@
as input to the RDFa processing rules. The normative language for
construction of the HTML5 DOM and XHTML5 DOM is contained in the HTML5
specification.
- </p>
- <h3 id=modifying-the-input-document><span class=secno>2.1 </span>Modifying the Input Document</h3>
- <p>
+ </p><h3 id=modifying-the-input-document><span class=secno>2.1 </span>Modifying the Input Document</h3><p>
<em>This section is informative.</em>
- </p>
- <p>
+ </p><p>
RDFa's tree-based processing rules, outlined in
<a href=http://www.w3.org/TR/rdfa-syntax/#sec_5.5.>Section 5.5: Sequence</a><a></a>
of the XHTML+RDFa specification, allow an input document to be
@@ -435,36 +394,27 @@
issues in HTML documents may be corrected before the input document is
translated into the DOM, a valid tree-based model, on which the
RDFa processing rules will operate.
- </p>
- <p>
+ </p><p>
Any mechanism that generates a data structure equivalent to the HTML5 or
XHTML5 DOM, such as the html5lib library, may be used as the mechanism to
construct the tree-based model provided as input to the RDFa processing
rules.
- </p>
- <h2 id=conformance-requirements><span class=secno>3 </span>
+ </p><h2 id=conformance-requirements><span class=secno>3 </span>
Conformance Requirements
- </h2><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p>
- <p>
+ </h2><p class="XXX annotation"><b>Status: </b><i>Working draft</i></p><p>
<em>This section is normative.</em>
- </p>
- <p>
+ </p><p>
The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be
interpreted as described in [<a class=nref href=#ref_RFC2119>RFC2119</a>].
- </p>
- <h3 id=document-conformance><span class=secno>3.1 </span>
+ </p><h3 id=document-conformance><span class=secno>3.1 </span>
Document Conformance
- </h3>
-
- <p>
+ </h3><p>
In order for a document to claim that it is a conforming HTML+RDFa document,
it must provide the facilities described as mandatory in this section.
The document conformance criteria are listed below, of which only a subset
are mandatory:
- </p>
-
- <ol><li>
+ </p><ol><li>
All document conformance requirements stated as mandatory in the HTML5
specification must be met.
</li>
@@ -483,8 +433,7 @@
</li>
</ol><h3 id=user-agent-conformance><span class=secno>3.2 </span>
User Agent Conformance
- </h3>
- <p>
+ </h3><p>
A conforming RDFa user agent must:
</p><ul><li>
Conform to all requirements listed in the
@@ -501,19 +450,15 @@
</li>
</ul><h3 id=rdfa-processor-conformance><span class=secno>3.3 </span>
RDFa Processor Conformance
- </h3>
- <p>
+ </h3><p>
A conforming RDFa Processor must implement all of the mandatory features
specified in the XHTML+RDFa specification. It must also support any
mandatory features specified in this specification.
- </p>
- <h2 id=modifications-to-xhtml-rdfa><span class=secno>4 </span>
+ </p><h2 id=modifications-to-xhtml-rdfa><span class=secno>4 </span>
Modifications to XHTML+RDFa
- </h2>
- <p>
+ </h2><p>
<em>This section is normative.</em>
- </p>
- <p>
+ </p><p>
The [<a href=http://www.w3.org/TR/rdfa-syntax/>XHTML+RDFa</a>]
Recommendation is the base document on which this specification builds.
XHTML+RDFa specifies the attributes, in
@@ -524,17 +469,13 @@
RDF from an XHTML document. This section specifies changes to the
attributes and processing model defined in XHTML+RDFa in order to
support extracting RDF from HTML documents.
- </p>
- <p>
+ </p><p>
The requirements and rules, as specified in XHTML+RDFa and further
modified in this document, apply to all HTML5 documents. The RDFa Processor
operating on HTML and XHTML documents, specifically the resulting DOMs,
must apply the same processing rules for both types of serializations and
DOMs.
- </p>
-
- <h3 id=specifying-the-language-for-a-literal><span class=secno>4.1 </span>Specifying the language for a literal</h3>
- <p>
+ </p><h3 id=specifying-the-language-for-a-literal><span class=secno>4.1 </span>Specifying the language for a literal</h3><p>
The <code>lang</code> attribute must be processed in the same manner
as the <code>xml:lang</code> attribute is in the XHTML+RDFa specification,
<a href=http://www.w3.org/TR/rdfa-syntax/#sec_5.5.>Section 5.5: Sequence</a>,
@@ -543,16 +484,12 @@
The rules for determining the language of a node are specified in the
section titled
<a href=http://www.w3.org/TR/html5/Overview.html#the-lang-and-xml:lang-attributes>The lang and xml:lang attributes</a> in the HTML5 specification.
-
<p>
If an author is editing an HTML fragment and is unsure of the final
encapsulating MIME type for their markup, it is suggested that the
author specify both <code>lang</code> and <code>xml:lang</code> where the
value in both attributes is exactly the same.
- </p>
-
- <h3 id=invalid-xmlliteral-values><span class=secno>4.2 </span>Invalid XMLLiteral values</h3>
- <p>
+ </p><h3 id=invalid-xmlliteral-values><span class=secno>4.2 </span>Invalid XMLLiteral values</h3><p>
When generating literals of type XMLLiteral, the processor must ensure that
the output XMLLiteral is a namespace well-formed XML fragment. A namespace
well-formed XML fragment has the following properties:
@@ -577,7 +514,6 @@
rules described in this section. If a sequence of characters cannot be
transformed into a namespace well-formed XML fragment, the triple
containing the XMLLiteral must not be generated.
-
<p>
An RDFa Processor that transforms the XML fragment must use the
<a href=http://www.w3.org/TR/html5/Overview.html#coercing-an-html-dom-into-an-infoset>Coercing an HTML DOM into an Infoset</a>
@@ -586,19 +522,16 @@
be used for generating the XMLLiteral is normatively defined in the
<a href=http://www.w3.org/TR/html5/Overview.html#serializing-xhtml-fragments>Serializing XHTML Fragments</a>
section of the HTML5 specification.
- </p>
- <p>
+ </p><p>
Transformation to a namespace well-formed XML fragment is required
because an application that consumes XMLLiteral data expects that
data to be a namespace well-formed XML fragment.
- </p>
- <p>
+ </p><p>
The transformation requirement does not apply to input data that are
text-only, such as literals that contain a <code>datatype</code> attribute
with an empty value (<code>""</code>), or input data that that contain
only text nodes.
- </p>
- <p>
+ </p><p>
An example transformation demonstrating the preservation of namespace values is provided below. The → symbol is used to denote that the line is a continuation of the previous line and is included purely for the purposes of readability:
</p><pre>
@@ -619,38 +552,29 @@
<pre>
<>
<http://example.org/vocab#markup>
- "<rect xmlns=\"http://www.w3.org/2000/svg\" xmlns:ex=\"http://example.org/vocab#\"
-→ xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" width=\"300\"
+ "<rect xmlns=\"http://www.w3.org/2000/svg\" width=\"300\"
→ height=\"100\" style=\"fill:rgb(0,0,255);stroke-width:1; stroke:rgb(0,0,0)\"/>
-→ <rect xmlns=\"http://www.w3.org/2000/svg\" xmlns:ex=\"http://example.org/vocab#\"
-→ xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" width=\"50\"
+→ <rect xmlns=\"http://www.w3.org/2000/svg\" width=\"50\"
→ height=\"50\" style=\"fill:rgb(255,0,0);stroke-width:2;
→ stroke:rgb(0,0,0)\"/>"^^http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral
</pre>
- Note the preservation of the namespaces by injecting a new
- <code>xmlns</code> attribute, as well as the attributes starting
- with the character sequence <code>xmlns:</code>, into each <code>rect</code>
- element.
-
-
- <h3 id=xmlns:-prefixed-attributes><span class=secno>4.3 </span><code>xmlns:</code>-Prefixed Attributes</h3>
-
- <p class=XXX>
+ Note the preservation of the SVG namespace by injecting a new
+ <code>xmlns</code> attribute. Since the <code>ex</code> and <code>rdf</code>
+ namespaces are not used in either <code>rect</code> element, they are
+ not preserved in the XMLLiteral.
+ <h3 id=xmlns:-prefixed-attributes><span class=secno>4.3 </span><code>xmlns:</code>-Prefixed Attributes</h3><p class=XXX>
While this section outlines xmlns: processing in RDFa, the support for
distributed extensibility in non-XML mode HTML5 (using xmlns and xmlns:)
is still an open issue. This section may be further modified before
Last Call based on progress made on the distributed extensibility issue.
- </p>
-
- <p>
+ </p><p>
CURIE prefix mappings specified using attributes prepended with
<code>xmlns:</code>
must be processed using the rules specified in
<a href="">Section 5.4, CURIE and URI Processing,</a>
contained in the XHTML+RDFa specification.
- </p>
- <p>
+ </p><p>
Since CURIE prefix mappings have been specified using <code>xmlns:</code>,
and since HTML attribute names are case-insensitive, CURIE prefix names
declared using the <code>xmlns:</code>attribute-name pattern
@@ -661,84 +585,25 @@
prefix mappings are interpreted in the same way between HTML
(case-insensitive attribute names) and XHTML (case-sensitive attribute
names) document types.
- </p>
- <h2 id=extensions-to-the-html5-syntax><span class=secno>5 </span>
+ </p><h2 id=extensions-to-the-html5-syntax><span class=secno>5 </span>
Extensions to the HTML5 Syntax
- </h2>
- <p>
+ </h2><p>
<em>This section is normative.</em>
- </p>
- <p>
+ </p><p>
There are a few changes that are required to the HTML5 specification in
order to fully support RDFa. The following sub-sections outline the
necessary modifications to the base HTML5 specification.
- </p>
-
- <h3 id=the-rdfa-attributes-and-valid-values><span class=secno>5.1 </span>The RDFa Attributes and Valid Values</h3>
-
- <p>
+ </p><h3 id=the-rdfa-attributes-and-valid-values><span class=secno>5.1 </span>The RDFa Attributes and Valid Values</h3><p>
All RDFa attributes and valid values (including CURIEs), as listed in
<a href=http://www.w3.org/TR/rdfa-syntax/#rdfa-attributes>Section 2.1: The RDFa Attributes</a>,
are conforming when used in an HTML5 or XHTML5 document.
- </p>
-
- <h3 id=the-profile-attribute-and-link-type><span class=secno>5.2 </span>The <code>profile</code> attribute and link type</h3>
- <p>
- For content conforming to this specification, <code>profile</code>
- is an obsolete but conforming attribute name when used in the
- <code>head</code> element and when its value is set to the
- XHTML Vocabulary URI: "http://www.w3.org/1999/xhtml/vocab".
- The <code>profile</code> link type replaces
- the <code>profile</code> attribute. The <code>profile</code> link type
- should be used in the <code>rel</code> attribute in a <code>link</code>
- element contained in the <code>head</code> element of a conforming
- document. When the <code>profile</code> link type is specified, its
- value must be the XHTML Vocabulary URI:
- "http://www.w3.org/1999/xhtml/vocab". For example:
- </p>
-<pre>
- <head>
- <link rel="profile" href="http://www.w3.org/1999/xhtml/vocab" />
- </head>
-</pre>
- <p>
- This particular attribute and link type is used to provide a language
- version signalling mechanism to the RDFa Processor. In future versions
- of RDFa, the value of the profile may trigger different processing
- rules in RDFa Processors.
- </p>
- <p>
- Authors should use the <code>profile</code> link type instead of the
- <code>profile</code> attribute when authoring new HTML documents.
- </p>
-
- <p>
- The table entry below extends the list of link types as specified in
- <a href=http://www.w3.org/TR/html5/Overview.html#linkTypes>Link types section</a>
- of the HTML5 specification:
- </p><table><thead><tr><th rowspan=2>Link type</th>
- <th colspan=2>Effect on...</th>
- <th rowspan=2>Brief description</th>
- </tr><tr><th><code>link</code></th>
- <th><code>a</code> and <code>area</code></th>
- </tr></thead><tbody><tr><td><code title=rel-profile>profile</code></td>
- <td><span title="hyperlink link">Hyperlink</span></td>
- <td><em>not allowed</em></td>
- <td>
- In the future, this may trigger different RDFa Processor behavior
- based on the value of the <code>href</code> attribute.
- </td>
- </tr></tbody></table><h3 id=conformance-criteria-for-xmlns:-prefixed-attributes><span class=secno>5.3 </span>Conformance Criteria for <code>xmlns:</code>-Prefixed Attributes</h3>
-
- <p class=XXX>
+ </p><h3 id=conformance-criteria-for-xmlns:-prefixed-attributes><span class=secno>5.2 </span>Conformance Criteria for <code>xmlns:</code>-Prefixed Attributes</h3><p class=XXX>
While this section outlines xmlns: conformance criteria for HTML+RDFa,
the support for distributed extensibility in non-XML mode HTML5
(using xmlns and xmlns:) is still an open issue. This section may be
further modified before Last Call based on progress made on the
distributed extensibility issue.
- </p>
-
- <p>
+ </p><p>
Since RDFa uses attributes starting with <code>xmlns:</code> to
specify CURIE prefixes, it is
important that any attribute starting with a case-insensitive match on
@@ -749,4 +614,8 @@
to this specification, attributes with names that have the case
insensitive prefix "<code>xmlns:</code>" are conforming in both HTML5 and
XHTML5.
- </p></body></html>
\ No newline at end of file
+ </p><h2 id=normative-references><span class=secno>6 </span>Normative References</h2><dl><dt id=#refsHTML5>[<a href=http://www.w3.org/TR/html5/>HTML5</a>] (currently not a REC)</dt>
+ <dd>The HTML5 Specification, Ian Hickson. W3C, Work in Progress</dd>
+ <dt id=refsXHTMLRDFA>[<a href=http://www.w3.org/TR/rdfa-syntax/>XHTML+RDFA</a>]</dt>
+ <dd>RDFa in XHTML: Syntax and Processing, Mark Birbeck, Shane McCarron, Steven Pemberton. W3C, October 2008.</dd>
+</dl></body></html>
\ No newline at end of file
Received on Thursday, 8 October 2009 03:47:47 UTC