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Re: [Team 6401]: concrete proposal using NotificationDescriptions

From: Gilbert Pilz <gilbert.pilz@oracle.com>
Date: Mon, 20 Jul 2009 15:45:53 -0700
Message-ID: <4A64F3A1.7000406@oracle.com>
To: "public-ws-resource-access@w3.org" <public-ws-resource-access@w3.org>
Attached is an update to my previous proposal. The substance is the same 
but the concepts, elements, etc. have been changed to reflect our 
current terminology in which an Event Source issues "Notifications" 
(one-way SOAP messages in various formats) about "Events" (occurrences 
of some incident or event the details of which are expressed in XML). 
"Notification Type" is now "Event Type", "NotificationDescriptions" is 
now "EventDescriptions", etc. I believe that this rewording and the 
terminology changes that motivated it help to clarify the following points:

    * Events have types that are relatively open ended (basically
      anything you can describe in XML Schema). Notifications have
      formats (e.g. Raw or Wrapped) that must be described by a
      specification or profile.
    * Regardless of the format of the Notification message used to
      transmit the information about an Event, the type of an Event
      remains constant.

- gp

On 6/8/2009 4:43 PM, Gilbert Pilz wrote:
> Attached is a proposal for defining and advertising Notification Types 
> based on the use of the NotificationDescriptions element. This 
> proposal adds three sections to WS-Eventing:
>
>     * Section 6 - describes the NotificationDescriptions element, how
>       it can be obtained using WS-Mex, and how the information about
>       its enclosed notificationTypes binds to both Raw and Wrapped
>       Notifications
>     * Appendix E - provides a copy of the XML Schema for the
>       NotificationDescriptions element
>     * Appendix F - defines the rules for transforming a
>       NotificationDescriptions element into a WSDL 1.1 definitions element
>
> - gp
>
>
> ------------------------------------------------------------------------
>
>
>   Web Services Eventing (WS-Eventing)
>
>
>     Editor's Draft $Date: 2009/05/27 22:36:17 $
>
> Latest version:
>     http://www.w3.org/TR/ws-eventing <http://www.w3.org/TR/ws-eventing>
> Previous version:
>     http://www.w3.org/TR/2009/WD-ws-eventing-20090317
> Editors:
>     Doug Davis, IBM
>     Ashok Malhotra, Oracle
>     Katy Warr, IBM
>     Wu Chou, Avaya
>
> Copyright <http://www.w3.org/Consortium/Legal/ipr-notice#Copyright> © 
> 2009 W3C <http://www.w3.org/>^® (MIT <http://www.csail.mit.edu/>, 
> ERCIM <http://www.ercim.org/>, Keio <http://www.keio.ac.jp/>), All 
> Rights Reserved. W3C liability 
> <http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer>, 
> trademark 
> <http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks> and 
> document use <http://www.w3.org/Consortium/Legal/copyright-documents> 
> rules apply.
>
> ------------------------------------------------------------------------
>
>
>     Abstract
>
> This specification describes a protocol that allows Web services to 
> subscribe to or accept subscriptions for event notification messages.
>
>
>     Status of this Document
>
> *This document is an editors' copy that has no official standing.*
>
>
>     Table of Contents
>
> 1 Composable Architecture <#composable>
> 2 Introduction <#intro>
>    2.1 Requirements <#reqs>
>    2.2 Delivery Modes <#DeliveryModes>
>    2.3 Subscription Managers <#SubMgr>
>    2.4 Example <#example>
> 3 Notations and Terminology <#notterms>
>    3.1 Notational Conventions <#conventions>
>    3.2 Considerations on the Use of Extensibility Points <#extensions>
>    3.3 XML Namespaces <#namespaces>
>    3.4 Terminology <#terms>
>    3.5 Compliance <#compliance>
> 4 Subscription Messages <#SubMsgs>
>    4.1 Subscribe <#Subscribe>
>    4.2 Renew <#Renew>
>    4.3 GetStatus <#GetStatus>
>    4.4 Unsubscribe <#Unsubscribe>
>    4.5 Subscription End <#SubscriptionEnd>
> 5 Notifications <#Notifications>
> 6 Advertising Notification Types <#advertising>
>    6.1 Notification Types <#NotificationTypes>
>    6.2 Retrieving Notification Types <#RetrievingNotificationTypes>
>    6.3 Bindings for Notification Types <#BindingNotificationTypes>
>       6.3.1 Binding for Raw Notifications <#BindingRawNotifications>
>       6.3.2 Binding for Wrapped Notifications 
> <#BindingWrappedNotifications>
> 7 Faults <#Faults>
>    7.1 Fault Detail RetryAfter Element <#FaultDetailRetryElement>
>    7.2 DeliveryModeRequestedUnavailable <#ModeUnavailable>
>    7.3 InvalidExpirationTime <#InvalidExpirationTime>
>    7.4 UnsupportedExpirationType <#UnsupportedExpirationType>
>    7.5 FilteringNotSupported <#FilteringNotSupported>
>    7.6 FilteringRequestedUnavailable <#FilteringRequestedUnavailable>
>    7.7 EventSourceUnableToProcess <#EventSourceUnableToProcess>
>    7.8 UnableToRenew <#UnableToRenew>
>    7.9 InvalidMessage <#InvalidMessage>
>    7.10 DeliveryFormatRequestUnavailable 
> <#DeliveryFormatRequestedUnavailable>
>    7.11 EmptyFilter <#EmptyFilter>
>    7.12 UnusableEPR <#UnusableEPR>
> 8 Security Considerations <#Security>
>    8.1 Message Security <#MessageSecurity>
>    8.2 Access Control <#AccessControl>
> 9 Implementation Considerations <#ImplConsideration>
> 10 Acknowledgements <#acks>
> 11 References <#refs>
>
>
>       Appendices
>
> A Service Metadata for Eventing <#Metadata>
> B XML Schema <#Schema>
> C WSDL <#WSDL>
> D WSDL for Standard Wrapped Delivery <#wrappedWSDL>
> E XML Schema for NotificationDescriptions <#NotifDescripSchema>
> F Rules for Generating WSDL from NotificationDescriptions 
> <#RulesWSDLNotifDescrip>
> G Change Log <#changelog>
>
> ------------------------------------------------------------------------
>
>
>     1 Composable Architecture
>
> By using the XML, SOAP [SOAP 1.1] <#SOAP11>, [SOAP 1.2] <#SOAP121>, 
> and WSDL [WSDL 1.1] <#WSDL11> extensibility models, the Web service 
> specifications (WS-*) are designed to be composed with each other to 
> provide a rich set of tools to provide security in the Web services 
> environment. This specification specifically relies on other Web 
> service specifications to provide secure, reliable, and/or transacted 
> message delivery and to express Web service and client policy.
>
>
>     2 Introduction
>
> Web services often want to receive messages when events occur in other 
> services and applications. A mechanism for registering interest is 
> needed because the set of Web services interested in receiving such 
> messages is often unknown in advance or will change over time. This 
> specification defines a protocol for one Web service (called a 
> "subscriber") to register interest (called a "subscription") with 
> another Web service (called an "event source") in receiving messages 
> about events (called "notifications"). The subscriber may manage the 
> subscription by interacting with a Web service (called the 
> "subscription manager") designated by the event source.
>
> To improve robustness, a subscription may be leased by an event source 
> to a subscriber, and the subscription expires over time. The 
> subscription manager provides the ability for the subscriber to renew 
> or cancel the subscription before it expires.
>
> There are many mechanisms by which event sources may deliver events to 
> event sinks. This specification provides an extensible way for 
> subscribers to identify the delivery mechanism they prefer. While 
> asynchronous, pushed delivery is defined here, the intent is that 
> there should be no limitation or restriction on the delivery 
> mechanisms capable of being supported by this specification.
>
>
>       2.1 Requirements
>
> This specification intends to meet the following requirements:
>
>    *
>
>       Define means to create and delete event subscriptions.
>
>    *
>
>       Define expiration for subscriptions and allow them to be renewed.
>
>    *
>
>       Define how one Web service can subscribe on behalf of another.
>
>    *
>
>       Define how an event source delegates subscription management to
>       another Web service.
>
>    *
>
>       Allow subscribers to specify how notifications should be delivered.
>
>    *
>
>       Leverage other Web service specifications for secure, reliable,
>       transacted message delivery.
>
>    *
>
>       Support complex eventing topologies that allow the originating
>       event source and the final event sink to be decoupled.
>
>    *
>
>       Provide extensibility for more sophisticated and/or currently
>       unanticipated subscription scenarios.
>
>    *
>
>       Support a variety of encoding formats, including (but not
>       limited to) both SOAP 1.1 [SOAP 1.1] <#SOAP11> and SOAP 1.2
>       [SOAP 1.2] <#SOAP121> Envelopes.
>
>
>       2.2 Delivery Modes
>
> While the general pattern of asynchronous, event-based messages is 
> extremely common, different applications often require different 
> notification delivery mechanisms. For instance, in some cases a simple 
> asynchronous message is optimal, while other situations may work 
> better if the event consumer can poll for notification in order to 
> control the flow and timing of message arrival. Some consumers will 
> require notifications to be wrapped in a standard "event" SOAP 
> envelope, while others will prefer messages to be delivered unwrapped. 
> Some consumers may require notifications to be delivered reliably, 
> while others may be willing to accept best-effort event delivery.
>
> In order to support this broad variety of event delivery requirements, 
> this specification introduces an abstraction called a Delivery Mode 
> and an abstraction called Delivery Format. These concepts are used as 
> an extension points, so that event sources and event consumers may 
> freely create new delivery mechanisms that are tailored to their 
> specific requirements. This specification provides a minimal amount of 
> support for delivery mode and format negotiation by allowing an event 
> source to provide a list of supported delivery modes and formats in 
> response to a subscription request specifying a delivery mode or 
> format it does not support.
>
> When the Delivery Format feature is engaged the formatting of the 
> going events occurs after any filtering. This ensures that regardless 
> of what type of formatting might occur, the same Filter 
> dialect/expression can be used to subset the event stream.
>
> This specification defines a single delivery mode, Push Mode, which is 
> simple asynchronous messaging.
>
> This specification specifies two delivery formats: wrapped and 
> unwrapped. Use of wrapped format indicates that notification messages 
> should be contained in a wrapper element. Use of unwrapped format 
> indicates that notification messages are not wrapped.
>
>
>       2.3 Subscription Managers
>
> In some scenarios the event source itself manages the subscriptions it 
> has created. In other scenarios, for example a geographically 
> distributed publish-and-subscribe system, it may be useful to delegate 
> the management of a subscription to another Web service. To support 
> this flexibility, the response to a subscription request to an event 
> source will include the EPR of a service that the subscriber may 
> interact with to manage this subscription. This EPR should be the 
> target for future requests to renew or cancel the subscription. It may 
> address the same Web service (Address and ReferenceParameters) as the 
> event source itself, or it may address some other Web service to which 
> the event source has delegated management of this subscription; 
> however, the full subscription manager EPR (Address and Reference 
> Parameters) must be unique for each subscription.
>
> We use the term "subscription manager" in this specification to refer 
> to the Web service that manages the subscription, whether it is the 
> event source itself or some separate Web service.
>
>
>       2.4 Example
>
> Example 2-1 <#Table1> lists a hypothetical request to create a 
> subscription for storm warnings.
>
> Example 2-1: Hypothetical request to create a subscription
> (01) <s12:Envelope
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ew="http://www.example.com/warnings" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/Subscribe
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:d7c5726b-de29-4313-b4d4-b3425b200839
> (12)     </wsa:MessageID>
> (13)     <wsa:ReplyTo>
> (14)      <wsa:Address>http://www.example.com/MyEventSink</wsa:Address>
> (15)     </wsa:ReplyTo>
> (16)     <wsa:To>http://www.example.org/oceanwatch/EventSource</wsa:To>
> (17)   </s12:Header>
> (18)   <s12:Body>
> (19)     <wse:Subscribe>
> (20)       <wse:Delivery>
> (21)         <wse:NotifyTo>
> (22)           <wsa:Address>
> (23)             http://www.example.com/MyEventSink/OnStormWarning
> (24)           </wsa:Address>
> (25)           <wsa:ReferenceParameters>
> (26)             <ew:MySubscription>2597</ew:MySubscription>
> (27)           </wsa:ReferenceParameters>
> (28)         </wse:NotifyTo>
> (29)       </wse:Delivery>
> (30)     </wse:Subscribe>
> (31)   </s12:Body>
> (32) </s12:Envelope>
>
> Lines (07-09) in Example 2-1 <#Table1> indicate the message is a 
> request to create a subscription, and Line (16) indicates that it is 
> sent to a hypothetical event source of ocean events.
>
> While Lines (13-15) indicate where a reply should be sent, Lines 
> (20-29) indicate where and how notifications should be delivered; 
> there is no requirement that these match. The absence of a Mode 
> attribute on Line (20) indicates that notifications should be 
> delivered using Push mode; that is, they should be asynchronously sent 
> as SOAP messages to the endpoint described in lines (21-28). Note that 
> Lines (25-27) illustrate a typical pattern where the event sink lists 
> a reference parameter (Line 26) that identifies the subscription and 
> will be included in each notification.
>
> Example 2-2 <#Table2> lists a hypothetical response to the request in 
> Example 2-1 <#Table1>.
>
> Example 2-2: Hypothetical response to a subscribe request
> (01) <s12:Envelope
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/SubscribeResponse
> (09)     </wsa:Action>
> (10)     <wsa:RelatesTo>
> (11)       uuid:d7c5726b-de29-4313-b4d4-b3425b200839
> (12)     </wsa:RelatesTo>
> (13)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (14)   </s12:Header>
> (15)   <s12:Body>
> (16)     <wse:SubscribeResponse>
> (17)       <wse:SubscriptionManager>
> (18)         <wsa:Address>
> (19)           http://www.example.org/oceanwatch/SubscriptionManager
> (20)         </wsa:Address>
> (21)         <wsa:ReferenceParameters>
> (22)           <ow:MyId>
> (23)             28
> (24)           </ow:MyId>
> (25)         </wsa:ReferenceParameters>
> (26)       </wse:SubscriptionManager>
> (27)       <wse:Expires>P0Y0M0DT30H0M0S</wse:Expires>
> (28)     </wse:SubscribeResponse>
> (29)   </s12:Body>
> (30) </s12:Envelope>
>
> Lines (07-09) in Example 2-2 <#Table2> indicate this message is a 
> response to a request to create a subscription, and Lines (10-12) 
> indicate that it is a response to the request in Example 2-1 
> <#Table1>. Lines (17-26) provide the subscription manager EPR for this 
> subscription, and Line (27) indicates the subscription will expire in 
> 30 hours unless renewed.
>
>
>     3 Notations and Terminology
>
> This section specifies the notations, namespaces, and terminology used 
> in this specification.
>
>
>       3.1 Notational Conventions
>
> The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", 
> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this 
> document are to be interpreted as described in RFC 2119 [RFC2119] 
> <#RFC2119>.

>
> This specification uses the following syntax to define normative 
> outlines for messages:
>
>    *
>
>       The syntax appears as an XML instance, but values in italics
>       indicate data types instead of values.
>
>    *
>
>       Characters are appended to elements and attributes to indicate
>       cardinality:
>
>          o
>
>             "?" (0 or 1)
>
>          o
>
>             "*" (0 or more)
>
>          o
>
>             "+" (1 or more)
>
>    *
>
>       The character "|" is used to indicate a choice between
>       alternatives.
>
>    *
>
>       The characters "(" and ")" are used to indicate that contained
>       items are to be treated as a group with respect to cardinality
>       or choice.
>
>    *
>
>       The characters "[" and "]" are used to call out references and
>       property names.
>
>    *
>
>       Ellipsis (i.e. "...") indicate a point of extensibility.
>
>    *
>
>       XML namespace prefixes (see Table 3-1 <#Table3>) are used to
>       indicate the namespace of the element being defined.
>
> In addition to Message Information Header properties [WS-Addressing] 
> <#AddrCore>, this specification uses the following properties to 
> define messages:
>
> *[Headers]*
>
>     Unordered message headers.
>
> *[Action]*
>
>     The value to be used for the wsa:Action URI.
>
> *[Body]*
>
>     A message body.
>
> These properties bind to a SOAP Envelope as follows:
>
> <s:Envelope>
>   <s:Header>
>     *[Headers]*
>     <wsa:Action>*[Action]*</wsa:Action>
>     ...
>   </s:Header>
>   <s:Body>*[Body]*</s:Body>
> </s:Envelope>
>
>
>       3.2 Considerations on the Use of Extensibility Points
>
> The elements defined in this specification MAY be extended at the 
> points indicated by their outlines and schema. Implementations MAY add 
> child elements and/or attributes at the indicated extension points but 
> MUST NOT contradict the semantics of the parent and/or owner, 
> respectively. If a receiver does not recognize an extension, the 
> receiver SHOULD ignore that extension. Senders MAY indicate the 
> presence of an extension that has to be understood through the use of 
> a corresponding SOAP Header with a soap:mustUnderstand attribute with 
> the value "1".
>
> Extension elements and attributes MUST NOT use the Web Services 
> Eventing namespace URI.
>
>
>       3.3 XML Namespaces
>
> The XML namespace URI that MUST be used by implementations of this 
> specification is:
>
> http://www.w3.org/2009/02/ws-evt
>
> Table 3-1 <#Table3> lists XML namespaces that are used in this 
> specification. The choice of any namespace prefix is arbitrary and not 
> semantically significant.
>
> Table 3-1: Prefixes and XML namespaces used in this specification 
> Prefix 	XML Namespace 	Specification(s)
> s 	(Either SOAP 1.1 or 1.2) 	(Either SOAP 1.1 or 1.2)
> s11 	http://schemas.xmlsoap.org/soap/envelope/ 
> <http://schemas.xmlsoap.org/soap/envelope/> 	SOAP 1.1 [SOAP 1.1] 
> <#SOAP11>
> s12 	http://www.w3.org/2003/05/soap-envelope 
> <http://www.w3.org/2003/05/soap-envelope> 	SOAP 1.2 [SOAP 1.2] <#SOAP121>
> wsdl 	http://schemas.xmlsoap.org/wsdl/ 
> <http://schemas.xmlsoap.org/wsdl/> 	WSDL [WSDL 1.1] <#WSDL11>
> wsa 	http://www.w3.org/2005/08/addressing 
> <http://www.w3.org/2005/08/addressing> 	WS-Addressing [WS-Addressing] 
> <#AddrCore>
> wse 	http://www.w3.org/2009/02/ws-evt 
> <http://www.w3.org/2009/02/ws-evt> 	This specification
> xs 	http://www.w3.org/2001/XMLSchema 
> <http://www.w3.org/2001/XMLSchema> 	XML Schema [XML Schema, Part 1] 
> <#XMLSchema1>, [XML Schema, Part 2] <#XMLSchema2>
>
> The working group intends to update the value of the Web Services 
> Eventing namespace URI each time a new version of this document is 
> published until such time that the document reaches Candidate 
> Recommendation status. Once it has reached Candidate Recommendation 
> status, the working group intends to maintain the value of the Web 
> Services Eventing namespace URI that was assigned in the Candidate 
> Recommendation unless significant changes are made that impact the 
> implementation or break post-CR implementations of the specification. 
> Also see http://www.w3.org/2001/tag/doc/namespaceState.html 
> <http://www.w3.org/2001/tag/doc/namespaceState.html> and 
> http://www.w3.org/2005/07/13-nsuri <http://www.w3.org/2005/07/13-nsuri>.
>
>
>       3.4 Terminology
>
> Delivery Mode
>
>     The mechanism by which notifications are delivered from the source
>     to the sink.
>
> Event Source
>
>     A Web service that sends notifications and accepts requests to
>     create subscriptions.
>
> Event Sink
>
>     A Web service that receives notifications.
>
> Notification
>
>     A one-way message sent to indicate that an event, or events, have
>     occurred.
>
> Push Mode
>
>     A delivery mechanism where the source sends notifications to the
>     sink as unsolicited, asynchronous SOAP messages.
>
> Subscriber
>
>     A Web service that sends requests to create, renew, and/or delete
>     subscriptions.
>
> Subscription Manager
>
>     A Web service that accepts requests to create, get the status of,
>     renew, and/or delete subscriptions on behalf of an event source.
>
>
>       3.5 Compliance
>
> An implementation is not compliant with this specification if it fails 
> to satisfy one or more of the MUST or REQUIRED level requirements 
> defined herein. A SOAP Node MUST NOT use the XML namespace identifier 
> for this specification (listed in *3.3 XML Namespaces* <#namespaces>) 
> within SOAP Envelopes unless it is compliant with this specification.
>
> Normative text within this specification takes precedence over the XML 
> Schema and WSDL descriptions, which in turn take precedence over 
> outlines, which in turn take precedence over examples.
>
> All messages defined by this specification MUST be sent to a Web 
> service that is addressable by an EPR (see [WS-Addressing] <#AddrCore>).
>
>
>     4 Subscription Messages
>
> To create, renew, and delete subscriptions, subscribers send request 
> messages to event sources and subscription managers.
>
> When an event source accepts a request to create a subscription, it 
> typically does so for a given amount of time, although an event source 
> may accept an indefinite subscription with no time-based expiration. 
> If the subscription manager accepts a renewal request, it updates that 
> amount of time. During that time, notifications are delivered by the 
> event source to the requested event sink. An event source may support 
> filtering to limit notifications that are delivered to the event sink; 
> if it does, and a subscribe request contains a filter, the event 
> source sends only notifications that match the requested filter. The 
> event source sends notifications until one of the following happens: 
> the subscription manager accepts an unsubscribe request for the 
> subscription; the subscription expires without being renewed; or the 
> event source cancels the subscription prematurely. In this last case, 
> the event source makes a best effort to indicate why the subscription 
> ended.
>
> In the absence of reliable messaging at the application layer (e.g. 
> [WS-ReliableMessaging] <#WSReliableMessaging>), messages defined 
> herein are delivered using the quality of service of the underlying 
> transport(s) and on a best-effort basis at the application layer.
>
>
>       4.1 Subscribe
>
> To create a subscription, a subscriber sends a request message of the 
> following form to an event source:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/Subscribe
>
> *[Body]*
>   <wse:Subscribe ...>
>     <wse:EndTo> /endpoint-reference/ </wse:EndTo> ?
>     <wse:Delivery Mode="/xs:anyURI/"? ...> /xs:any/* </wse:Delivery>
>     <wse:Format Name="/xs:anyURI/"? > /xs:any/* </wse:Format> ?
>     <wse:Expires> (/xs:dateTime/ | /xs:duration/) </wse:Expires> ?
>     <wse:Filter Dialect="/xs:anyURI/"? ...> /xs:any/* </wse:Filter> ?
>     /xs:any/*
>   </wse:Subscribe>
>
> The following describes additional, normative constraints on the 
> outline listed above:
>
> *[Body]*/wse:Subscribe/wse:EndTo
>
>     Where to send a SubscriptionEnd message if the subscription is
>     terminated unexpectedly. (See *4.5 Subscription End*
>     <#SubscriptionEnd>.) If present, this element MUST be of type
>     wsa:EndpointReferenceType. Default is not to send this message.
>     The endpoint to which the EndTo EPR refers MUST support the
>     SubcriptionEndPortType portType.
>
>     Note, subscribers wishing to correlate SubscriptionEnd messages
>     with the subscription to which they apply MAY wish to add a
>     distinguishing reference parameter to the EndTo EPR. For
>     convenience in this common situation, this specification defines a
>     global element, wse:Identifier of type xs:anyURI, that MAY be used
>     as a distinguishing reference parameter.
>
> *[Body]*/wse:Subscribe/wse:Delivery
>
>     A delivery destination for notification messages, using some
>     delivery mode. See *2.2 Delivery Modes* <#DeliveryModes> for details.
>
> *[Body]*/wse:Subscribe/wse:Delivery/@Mode
>
>     The delivery mode to be used for notification messages sent in
>     relation to this subscription. Implied value is
>     "http://www.w3.org/2009/02/ws-evt/DeliveryModes/Push", which
>     indicates that Push Mode delivery should be used. See *2.2
>     Delivery Modes* <#DeliveryModes> for details.
>
>     If the event source does not support the requested delivery mode,
>     the request MUST fail, and the event source MAY generate a
>     wse:DeliveryModeRequestedUnavailable fault indicating that the
>     requested delivery mode is not supported.
>
> *[Body]*/wse:Subscribe/wse:Delivery/@Mode="http://www.w3.org/2009/02/ws-evt/DeliveryModes/Push" 
>
>
>     Value of *[Body]*/wse:Subscribe/wse:Delivery MUST contain at least
>     the single element, wse:NotifyTo, that contains the endpoint
>     reference to which notification messages should be sent. The value
>     of this element is not constrained for other delivery modes.
>
> *[Body]*/wse:Subscribe/wse:Format
>
>     This optional element contains the delivery format to be used for
>     notification messages sent in relation to this subscription.
>     Implied value is
>     "http://www.w3.org/2009/02/ws-evt/DeliveryFormats/Unwrap", which
>     indicates that unwraped delivery should be used. See Section *2.2
>     Delivery Modes* <#DeliveryModes> for details.
>
>     If the event source does not support the requested delivery
>     format, the request MUST generate a
>     wse:DeliveryFormatRequestedUnavailable fault indicating that the
>     requested delivery format is not supported.
>
> *[Body]*/wse:Subscribe/wse:Format@Name="http://www.w3.org/2009/02/ws-evt/DeliveryFormats/Unwrap" 
>
>
>     Indicate the unwrapped event delivery format.
>
> *[Body]*/wse:Subscribe/wse:Format@Name="http://www.w3.org/2009/02/ws-evt/DeliveryFormats/Wrap" 
>
>
>     Indicate the wrapped event delivery format.
>
> *[Body]*/wse:Subscribe/wse:Expires
>
>     Requested expiration time for the subscription. (No implied
>     value.) The event source defines the actual expiration and is not
>     constrained to use a time less or greater than the requested
>     expiration. The expiration time may be a specific time or a
>     duration from the subscription's creation time. Both specific
>     times and durations are interpreted based on the event source's
>     clock.
>
>     If this element does not appear, then the request is for a
>     subscription that will not expire. That is, the subscriber is
>     requesting the event source to create a subscription with an
>     indefinite lifetime. If the event source grants such a
>     subscription, it may be terminated by the subscriber using an
>     Unsubscribe request, or it may be terminated by the event source
>     at any time for reasons such as connection termination, resource
>     constraints, or system shut-down.
>
>     If the expiration time is either a zero duration or a specific
>     time that occurs in the past according to the event source, then
>     the request MUST fail, and the event source MAY generate a
>     wse:InvalidExpirationTime fault indicating that an invalid
>     expiration time was requested.
>
>     Some event sources may not have a "wall time" clock available, and
>     so are only able to accept durations as expirations. If such a
>     source receives a Subscribe request containing a specific time
>     expiration, then the request MAY fail; if so, the event source MAY
>     generate a wse:UnsupportedExpirationType fault indicating that an
>     unsupported expiration type was requested.
>
> *[Body]*/wse:Subscribe/wse:Filter
>
>     A Boolean expression in some dialect, either as a string or as an
>     XML fragment (see *[[Body]/wse:Subscribe/wse:Filter/@Dialect
>     <#Dialect>]*). If the expression evaluates to false for a
>     notification, the notification MUST NOT be sent to the event sink.
>     Implied value is an expression that always returns true. If the
>     event source does not support filtering, then a request that
>     specifies a filter MUST fail, and the event source MAY generate a
>     wse:FilteringNotSupported fault indicating that filtering is not
>     supported.
>
>     If the event source supports filtering but cannot honor the
>     requested filtering, the request MUST fail, and the event source
>     MAY generate a wse:FilteringRequestedUnavailable fault indicating
>     that the requested filter dialect is not supported.
>
>     It is possible for a Subscribe request to contain a filter that
>     will never evaluate to true for the lifetime of the Subscription.
>     If an Event Source detects this condition it MAY generate a
>     wse:EmptyFilter fault in response to the Subscribe request message.
>
> *[Body]*/wse:Subscribe/wse:Filter/@Dialect
>
>     Implied value is "http://www.w3.org/TR/1999/REC-xpath-19991116".
>
>     While an XPath predicate expression provides great flexibility and
>     power, alternate filter dialects may be defined. For instance, a
>     simpler, less powerful dialect might be defined for
>     resource-constrained implementations, or a new dialect might be
>     defined to support filtering based on data not included in the
>     notification message itself. If desired, a filter dialect could
>     allow the definition of a composite filter that contained multiple
>     filters from other dialects.
>
> *[Body]*/wse:Subscribe/wse:Filter/@Dialect=" 
> http://www.w3.org/TR/1999/REC-xpath-19991116 
> <http://www.w3.org/TR/1999/REC-xpath-19991116>"
>
>     Value of *[Body]*/wse:Subscribe/wse:Filter is an XPath [XPath 1.0]
>     <#XPath1> predicate expression (PredicateExpr); the context of the
>     expression is:
>
>        *
>
>           Context Node: the SOAP Envelope containing the notification.
>
>        *
>
>           Context Position: 1.
>
>        *
>
>           Context Size: 1.
>
>        *
>
>           Variable Bindings: None.
>
>        *
>
>           Function Libraries: Core Function Library [XPath 1.0]
>           <#XPath1>.
>
>        *
>
>           Namespace Declarations: The [in-scope namespaces] property
>           [XML Infoset] <#XMLInfoset> of /s:Envelope/s:Body/*/wse:Filter.
>
> Other message information headers defined by WS-Addressing 
> [WS-Addressing] <#AddrCore> MAY be included in the request and 
> response messages, according to the usage and semantics defined in 
> WS-Addressing.
>
> Other components of the outline above are not further constrained by 
> this specification.
>
> If included within the Subscribe request message, the wse:NotifyTo and 
> wse:EndTo SHOULD have some cursory validity checking performed before 
> the Subscribe response is returned. While not all errors can be 
> detected prior to sending a message to those EPRs, some obvious ones 
> can be detected. For example, an unsupported transport specified 
> within the wsa:Address IRI. Detecting these errors during Subscribe 
> processing will lessen the chances of the subscriber creating an 
> unusable subscription. If this check is performed and a problem is 
> detected then the event source MAY generate a wse:UnusableEPR fault 
> rather than returning the SubscribeResponse message.
>
> If the event source accepts a request to create a subscription, it 
> MUST reply with a response of the following form:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/SubscribeResponse
>
> *[Body]*
>   <wse:SubscribeResponse ...>
>     <wse:SubscriptionManager>
>       /wsa:EndpointReferenceType/
>     </wse:SubscriptionManager>
>     <wse:Expires>(/xs:dateTime/ | /xs:duration/)</wse:Expires>
>     /xs:any/*
>   </wse:SubscribeResponse>
>
> The following describes additional, normative constraints on the 
> outline listed above:
>
> *[Body]*/wse:SubscribeResponse/wse:SubscriptionManager
>
>     The EPR of the subscription manager for this subscription.
>
>     In some cases, it is convenient for all EPRs issued by a single
>     event source to address a single Web service and use a reference
>     parameter to distinguish among the active subscriptions. For
>     convenience in this common situation, this specification defines a
>     global element, wse:Identifier of type xs:anyURI, that MAY be used
>     as a distinguishing reference parameter if desired by the event
>     source.
>
> *[Body]*/wse:SubscribeResponse/wse:Expires
>
>     The expiration time assigned by the event source. The expiration
>     time MAY be either an absolute time or a duration but SHOULD be of
>     the same type as the requested expiration (if any).
>
>     If this element does not appear, then the subscription will not
>     expire. That is, the subscription has an indefinite lifetime. It
>     may be terminated by the subscriber using an Unsubscribe request,
>     or it may be terminated by the event source at any time for
>     reasons such as connection termination, resource constraints, or
>     system shut-down.
>
> Other components of the outline above are not further constrained by 
> this specification.
>
> If the event source chooses not to accept a subscription, the request 
> MUST fail, and the event source MAY generate a 
> wse:EventSourceUnableToProcess fault indicating that the request was 
> not accepted.
>
> Example 4-1 <#Table4> lists another hypothetical request to create a 
> subscription.
>
> Example 4-1: Second hypothetical request to create a subscription
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ew="http://www.example.com/warnings" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/Subscribe
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:e1886c5c-5e86-48d1-8c77-fc1c28d47180
> (12)     </wsa:MessageID>
> (13)     <wsa:ReplyTo>
> (14)      <wsa:Address>http://www.example.com/MyEvEntsink</wsa:Address>
> (15)      <wsa:ReferenceParameters>
> (16)        <ew:MySubscription>2597</ew:MySubscription>
> (17)      </wsa:ReferenceParameters>
> (18)     </wsa:ReplyTo>
> (19)     <wsa:To>http://www.example.org/oceanwatch/EventSource</wsa:To>
> (20)   </s12:Header>
> (21)   <s12:Body>
> (22)     <wse:Subscribe>
> (23)       <wse:EndTo>
> (24)         <wsa:Address>
> (25)           http://www.example.com/MyEventSink
> (26)         </wsa:Address>
> (27)         <wsa:ReferenceParameters>
> (28)           <ew:MySubscription>2597</ew:MySubscription>
> (29)         </wsa:ReferenceParameters>
> (30)       </wse:EndTo>
> (31)       <wse:Delivery>
> (32)         <wse:NotifyTo>
> (33)           <wsa:Address>
> (34)             http://www.other.example.com/OnStormWarning
> (35)           </wsa:Address>
> (36)           <wsa:ReferenceParameters>
> (37)             <ew:MySubscription>2597</ew:MySubscription>
> (38)           </wsa:ReferenceParameters>
> (39)         </wse:NotifyTo>
> (40)       </wse:Delivery>
> (41)       <wse:Expires>2004-06-26T21:07:00.000-08:00</wse:Expires>
> (42)       <wse:Filter xmlns:ow="http://www.example.org/oceanwatch"
> (43)           Dialect="http://www.example.org/topicFilter" >
> (44)         weather.storms
> (45)       </wse:Filter>
> (46)     </wse:Subscribe>
> (47)   </s12:Body>
> (48) </s12:Envelope>
>
> Like the request in Example 2-1 <#Table1>, Lines (07-09) of Example 
> 4-1 <#Table4> indicate the message is a request to create a 
> subscription. Line (19) indicates that it is sent to a hypothetical 
> event source of ocean events.
>
> Lines (13-18) indicate where to send the response to this request, 
> Lines (23-30) indicate where to send a SubscriptionEnd message if 
> necessary, and Lines (31-34) indicate how and where to send 
> notifications.
>
> Line (41) indicates the event sink would prefer to have the 
> subscription expire on 26 June 2004 at 9:07 PM Pacific time.
>
> Lines (42-45) indicate the event sink only wants weather reports where 
> topic is storms, using a custom filter dialect.
>
> Example 4-2 <#Table5> lists a hypothetical response to the request in 
> Example 4-1 <#Table4>.
>
> Example 4-2: Hypothetical response to second subscribe request
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ew="http://www.example.com/warnings"
> (06)     xmlns:ow="http://www.example.org/oceanwatch" >
> (07)   <s12:Header>
> (08)     <wsa:Action>
> (09)       http://www.w3.org/2009/02/ws-evt/SubscribeResponse
> (10)     </wsa:Action>
> (11)     <wsa:RelatesTo>
> (12)       uuid:e1886c5c-5e86-48d1-8c77-fc1c28d47180
> (13)     </wsa:RelatesTo>
> (14)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (15)     <ew:MySubscription wsa:IsReferenceParameter="true">
> (16)       2597
> (17)     </ew:MySubscription>
> (18)   </s12:Header>
> (19)   <s12:Body>
> (20)     <wse:SubscribeResponse>
> (21)       <wse:SubscriptionManager>
> (22)         <wsa:Address>
> (23)           http://www.example.org/oceanwatch/SubscriptionManager
> (24)         </wsa:Address>
> (25)         <wsa:ReferenceParameters>
> (26)           <wse:Identifier>
> (27)             uuid:22e8a584-0d18-4228-b2a8-3716fa2097fa
> (28)           </wse:Identifier>
> (29)         </wsa:ReferenceParameters>
> (30)       </wse:SubscriptionManager>
> (31)       <wse:Expires>2004-07-01T00:00:00.000-00:00</wse:Expires>
> (32)     </wse:SubscribeResponse>
> (33)   </s12:Body>
> (34) </s12:Envelope>
>
> Like the response in Example 2-2 <#Table2>, Lines (08-10) of Example 
> 4-2 <#Table5> indicate this message is a response to a request to 
> create a subscription, and Lines (11-13) indicate that it is a 
> response to the request in Example 4-1 <#Table4> . Lines (14-17) 
> indicate the response is sent to the event sink indicated in Lines 
> (13-18) of Example 4-1 <#Table4>. Lines (21-30) provide the address of 
> the subscription manager for this subscription; note that this 
> particular response uses the global wse:Identifier element defined by 
> this specification. Finally, Line (31) indicates the subscription will 
> expire on 1 July 2004 unless renewed; there is no requirement that 
> this time be necessarily longer or shorter than the requested 
> expiration (Line (41) of Example 4-1 <#Table4>).
>
>
>       4.2 Renew
>
> To update the expiration for a subscription, subscription managers 
> MUST support requests to renew subscriptions.
>
> To renew a subscription, the subscriber sends a request of the 
> following form to the subscription manager:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/Renew
>
> *[Body]*
>   <wse:Renew ...>
>     <wse:Expires>(/xs:dateTime/ | /xs:duration/)</wse:Expires> ?
>     /xs:any/*
>   </wse:Renew>
>
> Components of the outline listed above are additionally constrained as 
> for a request to create a subscription (see *4.1 Subscribe* 
> <#Subscribe>). Other components of the outline above are not further 
> constrained by this specification.
>
> If the subscription manager accepts a request to renew a subscription, 
> it MUST reply with a response of the following form:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/RenewResponse
>
> *[Body]*
>   <wse:RenewResponse ...>
>     <wse:Expires>(/xs:dateTime/ | /xs:duration/)</wse:Expires> ?
>     /xs:any/*
>   </wse:RenewResponse>
>
> Components of the outline listed above are constrained as for a 
> response to a subscribe request (see *4.1 Subscribe* <#Subscribe>) 
> with the following addition(s):
>
> *[Body]*/wse:RenewResponse/wse:Expires
>
>     If the requested expiration is a duration, then the implied start
>     of that duration is the time when the subscription manager starts
>     processing the Renew request.
>
> If the subscription manager chooses not to renew this subscription, 
> the request MUST fail, and the subscription manager MAY generate a 
> wse:UnableToRenew fault indicating that the renewal was not accepted.
>
> Other components of the outline above are not further constrained by 
> this specification.
>
> Example 4-3 <#Table6> lists a hypothetical request to renew the 
> subscription created in Example 4-2 <#Table5>.
>
> Example 4-3: Hypothetical request to renew second subscription
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/Renew
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:bd88b3df-5db4-4392-9621-aee9160721f6
> (12)     </wsa:MessageID>
> (13)     <wsa:ReplyTo>
> (14)      <wsa:Address>http://www.example.com/MyEventSink</wsa:Address>
> (15)     </wsa:ReplyTo>
> (16)     <wsa:To>
> (17)       http://www.example.org/oceanwatch/SubscriptionManager
> (18)     </wsa:To>
> (19)     <wse:Identifier wsa:IsReferenceParameter="true">
> (20)       uuid:22e8a584-0d18-4228-b2a8-3716fa2097fa
> (21)     </wse:Identifier>
> (22)   </s12:Header>
> (23)   <s12:Body>
> (24)     <wse:Renew>
> (25)       <wse:Expires>2004-06-26T21:07:00.000-08:00</wse:Expires>
> (26)     </wse:Renew>
> (27)   </s12:Body>
> (28) </s12:Envelope>
>
> Lines (07-09) indicate this is a request to renew a subscription. 
> Lines (19-21) contain the reference parameter that indicates the 
> subscription to be renewed is the one created in Example 4-2 
> <#Table5>. Line (25) in Example 4-3 <#Table6> indicates the request is 
> to extend the subscription until 26 June 2004 at 9:07 PM Pacific.
>
> Example 4-4 <#Table7> lists a hypothetical response to the request in 
> Example 4-3 <#Table6>.
>
> Example 4-4: Hypothetical response to renew request
> (01) <s12:Envelope
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)      http://www.w3.org/2009/02/ws-evt/RenewResponse
> (09)     </wsa:Action>
> (10)     <wsa:RelatesTo>
> (11)       uuid:bd88b3df-5db4-4392-9621-aee9160721f6
> (12)     </wsa:RelatesTo>
> (13)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (14)   </s12:Header>
> (15)   <s12:Body>
> (16)     <wse:RenewResponse>
> (17)       <wse:Expires>2004-06-26T12:00:00.000-00:00</wse:Expires>
> (18)     </wse:RenewResponse>
> (19)   </s12:Body>
> (20) </s12:Envelope>
>
> Line (17) in Example 4-4 <#Table7> indicates the subscription has been 
> extended only until 26 June 2004 at noon.
>
>
>       4.3 GetStatus
>
> To get the status of a subscription, the subscriber sends a request of 
> the following form to the subscription manager:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/GetStatus
>
> *[Body]*
>   <wse:GetStatus ...>
>     /xs:any/*
>   </wse:GetStatus>
>
> Components of the outline listed above are additionally constrained as 
> for a request to renew a subscription (see *4.2 Renew* <#Renew>). 
> Other components of the outline above are not further constrained by 
> this specification.
>
> If the subscription is valid and has not expired, the subscription 
> manager MUST reply with a response of the following form:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/GetStatusResponse
>
> *[Body]*
>   <wse:GetStatusResponse ...>
>     <wse:Expires>(/xs:dateTime/ | /xs:duration/)</wse:Expires> ?
>     /xs:any/*
>   </wse:GetStatusResponse>
>
> Components of the outline listed above are constrained as for a 
> response to a renew request (see *4.2 Renew* <#Renew>). Other 
> components of the outline above are not further constrained by this 
> specification.
>
> Example 4-5 <#Table8> lists a hypothetical request to get the status 
> of the subscription created in Example 4-2 <#Table5>.
>
> Example 4-5: Hypothetical request to get the status of the second 
> subscription
> (01) <s12:Envelope
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/GetStatus
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:bd88b3df-5db4-4392-9621-aee9160721f6
> (12)     </wsa:MessageID>
> (13)     <wsa:ReplyTo>
> (14)       <wsa:Address>http://www.example.com/MyEventSink</wsa:Address>
> (15)     </wsa:ReplyTo>
> (16)     <wsa:To>
> (17)       http://www.example.org/oceanwatch/SubscriptionManager
> (18)     </wsa:To>
> (19)     <wse:Identifier wsa:IsReferenceParameter="true">
> (20)       uuid:22e8a584-0d18-4228-b2a8-3716fa2097fa
> (21)     </wse:Identifier>
> (22)   </s12:Header>
> (23)   <s12:Body>
> (24)     <wse:GetStatus />
> (25)   </s12:Body>
> (26) </s12:Envelope>
>
> Lines (07-09) indicate this is a request to get the status of a 
> subscription. Lines (16-21) indicate that the request is sent to the 
> subscription manager for the subscription created in Example 4-2 
> <#Table5>.
>
> Example 4-6 <#Table9> lists a hypothetical response to the request in 
> Example 4-5 <#Table8>.
>
> Example 4-6: Hypothetical response to get status request
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/GetStatusResponse
> (09)     </wsa:Action>
> (10)     <wsa:RelatesTo>
> (11)       uuid:bd88b3df-5db4-4392-9621-aee9160721f6
> (12)     </wsa:RelatesTo>
> (13)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (14)   </s12:Header>
> (15)   <s12:Body>
> (16)     <wse:GetStatusResponse>
> (17)       <wse:Expires>2004-06-26T12:00:00.000-00:00</wse:Expires>
> (18)     </wse:GetStatusResponse>
> (19)   </s12:Body>
> (20) </s12:Envelope>
>
> Line (17) in Example 4-6 <#Table9> indicates the subscription will 
> expire on 26 June 2004 at noon.
>
>
>       4.4 Unsubscribe
>
> Though subscriptions expire eventually, to minimize resources, the 
> subscribing event sink SHOULD explicitly delete a subscription when it 
> no longer wants notifications associated with the subscription.
>
> To explicitly delete a subscription, a subscribing event sink sends a 
> request of the following form to the subscription manager:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/Unsubscribe
>
> *[Body]*
>   <wse:Unsubscribe ...>
>     /xs:any/*
>   </wse:Unsubscribe>
>
> Components of the outline above are additionally constrained only as 
> for a request to renew a subscription (see *4.2 Renew* <#Renew>). For 
> example, the faults listed there are also defined for a request to 
> delete a subscription.
>
> If the subscription manager accepts a request to delete a 
> subscription, it MUST reply with a response of the following form:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/UnsubscribeResponse
>
> *[Body]*
>   <wse:UnsubscribeResponse ...>
>     /xs:any/*
>   </wse:UnsubscribeResponse>
>
> Components of the outline listed above are not further constrained by 
> this specification.
>
> Example 4-7 <#Table10> lists a hypothetical request to delete the 
> subscription created in Example 4-2 <#Table5>.
>
> Example 4-7: Hypothetical unsubscribe request to delete second 
> subscription
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/Unsubscribe
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:2653f89f-25bc-4c2a-a7c4-620504f6b216
> (12)     </wsa:MessageID>
> (13)     <wsa:ReplyTo>
> (14)      <wsa:Address>http://www.example.com/MyEventSink</wsa:Address>
> (15)     </wsa:ReplyTo>
> (16)     <wsa:To>
> (17)       http://www.example.org/oceanwatch/SubscriptionManager
> (18)     </wsa:To>
> (19)     <wse:Identifier wsa:IsReferenceParameter="true">
> (20)       uuid:22e8a584-0d18-4228-b2a8-3716fa2097fa
> (21)     </wse:Identifier>
> (22)   </s12:Header>
> (23)   <s12:Body>
> (24)     <wse:Unsubscribe />
> (25)   </s12:Body>
> (26) </s12:Envelope>
>
> Lines (07-09) in Example 4-7 <#Table10> indicate the message is a 
> request to delete a subscription. Lines (16-21) indicate that the 
> request is addressed to the manager for the subscription created in 
> Example 4-2 <#Table5>.
>
> Example 4-8 <#Table11> lists a hypothetical response to the request in 
> Example 4-7 <#Table10>.
>
> Example 4-8: Hypothetical response to unsubscribe request
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing" >
> (04)   <s12:Header>
> (05)     <wsa:Action>
> (06)       http://www.w3.org/2009/02/ws-evt/UnsubscribeResponse
> (07)     </wsa:Action>
> (08)     <wsa:RelatesTo>
> (09)       uuid:2653f89f-25bc-4c2a-a7c4-620504f6b216
> (10)     </wsa:RelatesTo>
> (11)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (12)   </s12:Header>
> (13)   <s12:Body>
> (14)     <wse:UnsubscribeResponse/>
> (15)   </s12:Body>
> (16) </s12:Envelope>
>
>
>       4.5 Subscription End
>
> If the event source terminates a subscription unexpectedly, the event 
> source SHOULD send a Subscription End SOAP message to the endpoint 
> reference indicated when the subscription was created (see *4.1 
> Subscribe* <#Subscribe>). This endpoint reference MUST refer to an 
> endpoint that supports the SubscriptionEndPortType portType. The 
> message MUST be of the following form:
>
> *[Action]*
>   http://www.w3.org/2009/02/ws-evt/SubscriptionEnd
>
> *[Body]*
>   <wse:SubscriptionEnd ...>
>     <wse:Status>
>       ( http://www.w3.org/2009/02/ws-evt/DeliveryFailure | 
>         http://www.w3.org/2009/02/ws-evt/SourceShuttingDown |
>         http://www.w3.org/2009/02/ws-evt/SourceCancelling )
>     </wse:Status>
>     <wse:Reason xml:lang="/language identifier/" >/xs:string/</wse:Reason> ?
>     /xs:any/*
>   </wse:SubscriptionEnd>
>
> The following describes additional, normative constraints on the 
> outline listed above:
>
> *[Body]*/wse:SubscriptionEnd/wse:Status = 
> "http://www.w3.org/2009/02/ws-evt/DeliveryFailure"
>
>     This value MUST be used if the event source terminated the
>     subscription because of problems delivering notifications.
>
> *[Body]*/wse:SubscriptionEnd/wse:Status = 
> "http://www.w3.org/2009/02/ws-evt/SourceShuttingDown"
>
>     This value MUST be used if the event source terminated the
>     subscription because the source is being shut down in a controlled
>     manner; that is, if the event source is being shut down but has
>     the opportunity to send a SubscriptionEnd message before it exits.
>
> *[Body]*/wse:SubscriptionEnd/wse:Status = 
> "http://www.w3.org/2009/02/ws-evt/SourceCancelling"
>
>     This value MUST be used if the event source terminated the
>     subscription for some other reason before it expired.
>
> *[Body]*/wse:SubscriptionEnd/wse:Reason
>
>     This optional element contains text, in the language specified by
>     the @xml:lang attribute, describing the reason for the unexpected
>     subscription termination.
>
> Other message information headers defined by WS-Addressing 
> [WS-Addressing] <#AddrCore> MAY be included in the message, according 
> to the usage and semantics defined in WS-Addressing.
>
> Other components of the outline above are not further constrained by 
> this specification.
>
> Example 4-9 <#Table12> lists a hypothetical SubscriptionEnd message 
> corresponding to an early termination of the subscription created in 
> Example 4-1 <#Table4>.
>
> Example 4-9: Hypothetical subscription end message
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:wse="http://www.w3.org/2009/02/ws-evt" 
> (05)     xmlns:ew="http://www.example.com/warnings" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.w3.org/2009/02/ws-evt/SubscriptionEnd
> (09)     </wsa:Action>
> (10)     <wsa:To>http://www.example.com/MyEventSink</wsa:To>
> (11)     <ew:MySubscription wsa:IsReferenceParameter="true">
> (12)       2597
> (13)     </ew:MySubscription>
> (14)   </s12:Header>
> (15)   <s12:Body>
> (16)     <wse:SubscriptionEnd>
> (17)       <wse:Status>wse:SourceShuttingDown</wse:Status>
> (18)       <wse:Reason xml:lang="en-US" >
> (19)         Event source going off line.
> (20)       </wse:Reason>
> (21)     </wse:SubscriptionEnd>
> (22)   </s12:Body>
> (23) </s12:Envelope>
>
> Line (08) is the action URI for Subscription End. Lines (10-13) 
> indicate the message is sent to the EndTo of the subscribe request 
> (Lines (23-30) in Example 4-1 <#Table4> .). Line (17) indicates the 
> event source is shutting down, and Lines (18-20) indicate that the 
> event source was going off line.
>
>
>     5 Notifications
>
> This specification does not constrain notifications because any 
> message MAY be a notification.
>
> However, if a subscribing event sink wishes to have notifications 
> specifically marked, it MAY specify literal SOAP header blocks in the 
> Subscribe request, in the 
> /s:Envelope/s:Body/wse:Subscribe/wse:NotifyTo/wsa:ReferenceParameters 
> element; per WS-Addressing [WS-Addressing] <#AddrCore>, the event 
> source MUST include each such literal SOAP header block in every 
> notification sent to the endpoint addressed by 
> /s:Envelope/s:Body/wse:Subscribe/wse:NotifyTo.
>
> Example 5-1 <#Table13> lists a hypothetical notification message sent 
> as part of the subscription created by the subscribe request in 
> Example 4-1 <#Table4>.
>
> Example 5-1: Hypothetical notification message
> (01) <s12:Envelope 
> (02)     xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (03)     xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (04)     xmlns:ew="http://www.example.com/warnings"
> (05)     xmlns:ow="http://www.example.org/oceanwatch" >
> (06)   <s12:Header>
> (07)     <wsa:Action>
> (08)       http://www.example.org/oceanwatch/2003/WindReport
> (09)     </wsa:Action>
> (10)     <wsa:MessageID>
> (11)       uuid:568b4ff2-5bc1-4512-957c-0fa545fd8d7f
> (12)     </wsa:MessageID>
> (13)     <wsa:To>http://www.other.example.com/OnStormWarning</wsa:To>
> (14)     <ew:MySubscription wsa:IsReferenceParameter="true">
> (15)       2597
> (16)     </ew:MySubscription>
> (17)     <ow:EventTopics>weather.report weather.storms</ow:EventTopics>
> (18)   </s12:Header>
> (19)   <s12:Body>
> (20)     <ow:WindReport>
> (21)       <ow:Date>030701</ow:Date>
> (22)       <ow:Time>0041</ow:Time>
> (23)       <ow:Speed>65</ow:Speed>
> (24)       <ow:Location>BRADENTON BEACH</ow:Location>
> (25)       <ow:County>MANATEE</ow:County>
> (26)       <ow:State>FL</ow:State>
> (27)       <ow:Lat>2746</ow:Lat>
> (28)       <ow:Long>8270</ow:Long>
> (29)       <ow:Comments xml:lang="en-US" >
> (30)         WINDS 55 WITH GUSTS TO 65. ROOF TORN OFF BOAT HOUSE. REPORTED
> (31)         BY STORM SPOTTER. (TBW)
> (32)       </ow:Comments>
> (33)     </ow:WindReport>
> (34)   </s12:Body>
> (35) </s12:Envelope>
>
> Lines (13-15) indicate the message is sent to the endpoint indicated 
> by the subscribe request (Lines (32-39) in Example 4-1 <#Table4>). 
> Line (17) matches the filter in the subscribe request (Lines (42-45) 
> in Example 4-1 <#Table4>).
>
>
>     6 Advertising Notification Types
>
> There are many use cases for WS-Eventing in which it is necessary for 
> the Subscriber and the Event Sink to know the structure and contents 
> of the Notifications that may result from a succesful Subscribe 
> request. For example, a developer may wish to use existing WSDL-based 
> tools to generate service stubs capable of marshalling and dispatching 
> Notifications. In addition to this, the effective use of the XPath 
> filter dialect defined in Section 4.1 <#Subscribe> requires some 
> knowledge of the schema of the Notifications to be filtered.
>
> There are many ways in which an Event Source could describe and 
> advertise the structure of its Notifications. To provide a basic level 
> of interoperability, this specification defines the following, 
> optional mechanism for describing and advertising Notification Types. 
> If an implementation of a WS-Eventing Event Source chooses to describe 
> the structure of its Notifications and advertise this description to 
> Subscribers and Event Sinks, it is RECOMMENDED that this mechanism be 
> used.
>
>
>       6.1 Notification Types
>
> The "type" of a Notification can be thought of as that portion of the 
> format of a Notification that is independent of both the WS-Eventing 
> protocol and the mechanism used to transmit that Notification. For 
> example, the following Notification, although transmitted using the 
> Wrapped format, has the same type as the Notification in Example 5-1 
> <#Table13>:
>
> Example 6-1: Hypothetical Wrapped Notification
>  (01) <s12:Envelope xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
>  (02)               xmlns:wsa="http://www.w3.org/2005/08/addressing"
>  (03)               xmlns:wse="http://www.w3.org/2009/02/ws-evt"
>  (04)               xmlns:ew="http://www.example.com/warnings"
>  (05)               xmlns:ow="http://www.example.org/oceanwatch">
>  (06)   <s12:Header>
>  (07)     <wsa:Action>
>  (08)       http://www.w3.org/2009/02/ws-evt/wrap/GenericSinkPortType/NotifyEvent
>  (09)     </wsa:Action>
>  (10)     . . .
>  (11)   </s12:Header>
>  (12)   <s12:Body>
>  (13)     <wse:Notify actionURI="http://www.example.org/oceanwatch/2003/WindReport">
>  (14)       <ow:WindReport>
>  (15)         <ow:Date>030701</ow:Date>
>  (16)         <ow:Time>0041</ow:Time>
>  (17)         <ow:Speed>65</ow:Speed>
>  (18)         <ow:Location>BRADENTON BEACH</ow:Location>
>  (19)         <ow:County>MANATEE</ow:County>
>  (20)         <ow:State>FL</ow:State>
>  (21)         <ow:Lat>2746</ow:Lat>
>  (22)         <ow:Long>8270</ow:Long>
>  (23)         <ow:Comments xml:lang="en-US" >
>  (24)           WINDS 55 WITH GUSTS TO 65. ROOF TORN OFF BOAT HOUSE. REPORTED
>  (25)           BY STORM SPOTTER. (TBW)
>  (26)         </ow:Comments>
>  (27)       </ow:WindReport>
>  (28)     </wse:Notify>
>  (29)   </s12:Body>
>  (30) </s12:Envelope>
>       
>
> Notification Types are defined by Global Element Declarations in XML 
> Schema [XML Schema, Part 1] <#XMLSchema1>, [XML Schema, Part 2] 
> <#XMLSchema2>. Notification Types are declared within a 
> NotificationDescriptions element. The NotificationDescriptions element 
> has the following form:
>
> <wse:NotificationDescriptions targetNamespace="/xs:anyURI/" ...>
>   <wse:types>
>     [ <xs:import namespace="/xs:anyURI/" schemaLocation="/xs:anyURI/"/> ? |
>       <xs:schema targetNamespace="/xs:anyURI/"/> ? |
>       /other extension elements/ ] *
>   </wse:types>
>   <wse:notificationType name="/xs:NCName/" element="/xs:QName/" actionURI="/xs:anyURI/" ...>
>     /xs:any/ *
>   </wse:notificationType> +
>   /xs:any/ *
> </wse:NotificationDescriptions>
>       
>
> The XML Schema for the NoticationDesciptions element can be found in 
> Apppendix E <#NotifDescripSchema>. The following describes additional, 
> normative constraints on the outlined listed above:
>
> */wse:NotificationDescriptions*
>
>     This element contains the declarations of all the Notification
>     Types that apply to a given context, such as a particular Event
>     Source.
>
> */wse:NotificationDescriptions/@targetNamespace*
>
>     This attribute defines the namespace affiliation of the
>     Notification Types declared within the NotificationDescriptions
>     element. Its value MUST be an absolute IRI [IETF RFC 3987]
>     <#TODO>. It MAY be dereferencable.
>
> */wse:NotificationDescriptions/wse:types*
>
>     As described earlier, a Notification Type is defined by a Global
>     Element Declaration (GED) in XML Schema. This element contains
>     collections of imported and inlined schema components that
>     describe the GEDs that are used to define Notification Types.
>
> */wse:NotificationDescriptions/wse:notificationType*
>
>     This element declares a specific Notification Type.
>
> */wse:NotificationDescriptions/wse:notificationType/@name*
>
>     This attribute provides a unique name for this Notification Type
>     amongst all the Notification Types defined by the enclosing
>     wse:NotificationDescriptions element. In conjunction with a Prefix
>     that is associated with the value of
>     /wse:NotificationDescriptions/@targetNamespace namespace URI, the
>     value of this attribute MAY be used as the LocalPart of a QName
>     that identifies this Notification Type outside the context of the
>     enclosing wse:NotificationDescriptions element.
>
> */wse:NotificationDescriptions/wse:notificationType/@element*
>
>     This attribute refers to a GED defined or imported in the
>     /wse:NotificationDescriptions/wse:types element. The referenced
>     GED serves as the definition of this Notification Type.
>
> */wse:NotificationDescriptions/wse:notificationType/@actionURI*
>
>     This attribute provides a value for the various 'action'
>     properties and attributes which, depending upon the format of the
>     Notification, serve as a potential aide to identifying the
>     semantics implied by the message.
>
> The following is an example of a NotificationsDescriptions element 
> that could serve as a description of the Notification Type used in 
> Example 5-1 <#Table13> and Example 6-1 <#Table14>.
>
> Example 6-2: NotificationDescriptions
> (01) <wse:NotificationDescriptions targetNamepace="http://www.example.org/oceanwatch/notifications"
> (02)                               xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (03)                               xmlns:ow="http://www.example.org/oceanwatch">
> (04)   <wse:types>
> (05)     <xs:schema targetNamepace="http://www.example.org/oceanwatch">
> (06)       <xs:include schemaLocation="http://www.example.org/schemas/oceanwatch.xsd"/>
> (07)       <xs:element name="WindReport" type="ow:WindReportType">
> (08)     </xs:schema>
> (09)   </wse:types>
> (10)
> (11)   <wse:notifcationType name="WindReportNotification"
> (12)                        element="ow:WindReport"
> (13)                        actionURI="http://www.example.org/oceanwatch/2003/WindReport"/>
> (14) </wsem:NotificationDescriptions>
>       
>
>
>       6.2 Retrieving Notification Types
>
> Although there are many ways in which an Event Source can make its 
> NotificationDescription available to potential Subscribers and Event 
> Sinks, this specification RECOMMENDS the use of the mechanisms 
> described in WS-MetadataExchange [WS-MetadataExchange] <#MEX>. To that 
> end, this specification defines the following URI to serve as the 
> Dialect URI for the wse:NotificationDescriptions element.
>
> http://www.w3.org/2009/02/ws-evt/NotificationDescriptions
>       
>
> A mex:GetMetadata request with a mex:Dialect value that permits the 
> inclusion of Metadata Sections with a dialect of 
> "http://www.w3.org/2009/02/ws-evt/NotificationDescriptions", when 
> targeted to a Subscription Endpoint MAY, in its corresponding 
> mex:GetMetadataResponse, include (in addition to other Metadata 
> Sections that may be present) a *single* Metadata Section with a 
> wse:NotificationDescription as its dialect specific element. The value 
> of the @Dialect attribute for this Metadata Section MUST be 
> "http://www.w3.org/2009/02/ws-evt/NotificationDescriptions". The value 
> of the @Identifier attribute for this Metadata Section MUST be the 
> same as the value of the wse:NotificationDescription/@targetNamespace.
>
> The following GetMetadata request, when sent to the Subscription 
> Endpoint used in Example 2-1 <#Table1>
>
> Example 6-3: GetMetadata Request or NotificationDescriptions
> (01) <s12:Envelope xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (02)                  xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (03)                  xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (04)                  xmlns:mex="http://www.w3.org/2009/02/ws-mex">
> (05)   <s12:Header>
> (06)     <wsa:Action>
> (07)       http://www.w3.org/2009/02/ws-mex/GetMetadata
> (08)     </wsa:Action>
> (09)     <wsa:MessageID>
> (10)       uuid:
> (11)     </wsa:MessageID>
> (12)     <wsa:To>http://www.example.org/oceanwatch/EventSource</wsa:To>
> (13)   </s12:Header>
> (14)   <s12:Body>
> (15)     <mex:GetMetadata>
> (16)       <mex:Dialect URI="http://www.w3.org/2009/02/ws-evt/NotificationDescriptions"/>
> (17)     </mex:GetMetadata>
> (18)   </s12:Body>
> (19) </s12:Envelope>
>       
>
> returns the following GetMetadataResponse element
>
> Example 6-4: GetMetadataResponse with NotificationDescriptions
> (01) <s12:Envelope xmlns:s12="http://www.w3.org/2003/05/soap-envelope"
> (02)                  xmlns:wsa="http://www.w3.org/2005/08/addressing"
> (03)                  xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (04)                  xmlns:mex="http://www.w3.org/2009/02/ws-mex">
> (05)   <s12:Header>
> (06)     <wsa:Action>
> (07)       http://www.w3.org/2009/02/ws-mex/GetMetadataResponse
> (08)     </wsa:Action>
> (09)     <wsa:RelatesTo>
> (10)       uuid:126287f0-521d-11de-8a39-0800200c9a66
> (11)     </wsa:RelatesTo>
> (12)   </s12:Header>
> (13)   <s12:Body>
> (14)     <mex:Metadata>
> (15)       <mex:MetadataSection Dialect="http://www.w3.org/2009/02/ws-evt/NotificationDescriptions"
> (16)                            Identifier="http://www.example.org/oceanwatch/notifications">
> (17)         <wse:NotificationDescriptions targetNamepace="http://www.example.org/oceanwatch/notifications"
> (18)                                       xmlns:wse="http://www.w3.org/2009/02/ws-evt"
> (19)                                       xmlns:ow="http://www.example.org/oceanwatch">
> (20)           <wse:types>
> (21)             <xs:schema targetNamepace="http://www.example.org/oceanwatch">
> (22)               <xs:include schemaLocation="http://www.example.org/schemas/oceanwatch.xsd"/>
> (23)               <xs:element name="WindReport" type="ow:WindReportType">
> (24)             </xs:schema>
> (25)           </wse:types>
> (26)
> (27)           <wse:notifcationType name="WindReportNotification"
> (28)                                element="ow:WindReport"
> (29)                                actionURI="http://www.example.org/oceanwatch/2003/WindReport"/>
> (30)         </wsem:NotificationDescriptions>
> (31)       </mex:MetadataSection
> (32)     </mex:Metadata>
> (33)   </s12:Body>
> (34) </s12:Envelope>
>       
>
>
>       6.3 Bindings for Notification Types
>
> For any Subscription Format it is necessary to understand how a given 
> Notification Type will appear on the wire for subscriptions created 
> with that format. The following sections define how Notification Types 
> bind to Notifications for the two types of format defined within this 
> specification; Raw and Wrapped. Specifications or profiles that define 
> additional Subscription Formats SHOULD define how Notification Types 
> bind to the Notifications for those formats.
>
>
>         6.3.1 Binding for Raw Notifications
>
> The information about a Notification Type contained in the 
> |notificationType| element binds to a Raw Notification of that type as 
> follows:
>
>     * The [action] property of the Raw Notification has the value of
>       the |actionURI| attribute of the |notificationType| element
>       corresponding to the type of the Notification being transmitted.
>     * The [children] property of the Raw Notification's |Body| element
>       has a single child element. This child element is an instance of
>       the Global Element Declaration referenced by the |element|
>       attribute of the |notificationType| element corresponding to the
>       type of the Notification being transmitted.
>
> Observant readers will note that the Notifications described above are 
> the same as the messages that would result from a WSDL definition that 
> contained a Document/literal binding of a portType with a one-way 
> operation in which the input message contained a single part with an 
> element value equal to the value of the |element| attribute of the 
> |notificationType| element. This correspondence is deliberate and is 
> intended to allow developers of Event Sinks to use their existing 
> WSDL-based tools to generate service stubs capable of marshalling and 
> dispatching Raw Notifications. A complete set of rules for 
> transforming a NotificationDescriptions element into a WSDL 
> description are provided in Appendix F <#RulesWSDLNotifDescrip>.
>
>
>         6.3.2 Binding for Wrapped Notifications
>
> The information about a Notification Type contained in the 
> |notificationType| element binds to a Wrapped Notification of that 
> type as follows:
>
>     * The |/soap:Envelope/soap:Body/wse:Notify/@actionURI| attribute
>       of the Wrapped Notification has the value of the |actionURI|
>       attribute of the |notificationType| element corresponding to the
>       type of the Notification being transmitted.
>     * The |/soap:Envelope/soap:Body/wse:Notify| element has a single
>       child element. This child element is an instance of the Global
>       Element Declaration referenced by the |element| attribute of the
>       |notificationType| element corresponding to the type of the
>       Notification being transmitted.
>
>
>     7 Faults
>
> All fault messages defined in this specification MUST be sent 
> according to the rules described in WS-Addressing section 4. They are 
> sent to the [fault endpoint], if present and valid. Otherwise they are 
> sent to the [reply endpoint] if present. If neither is present faults 
> may be sent to the [source endpoint].
>
> Endpoints compliant with this specification MUST include required 
> message information headers on all fault messages. Fault messages are 
> correlated as replies using the [relationship] property as defined in 
> WS-Addressing. The [action] property below designates fault messages: 
> http://www.w3.org/2009/02/ws-evt/fault
>
> The definitions of faults use the following properties:
>
> *[Code]* 	The fault code.
> *[Subcode]* 	The fault subcode.
> *[Reason]* 	The English language reason element.
> *[Detail]* 	The detail element. If absent, no detail element is 
> defined for the fault.
>
> The properties above bind to a SOAP 1.2 fault as follows:
>
> <S:Envelope> 
>  <S:Header>
>    <wsa:Action>
>      http://www.w3.org/2009/02/ws-evt/fault
>    </wsa:Action>
>    <!-- Headers elided for clarity.  -->
>  </S:Header>
>  <S:Body>
>   <S:Fault>
>    <S:Code>
>      <S:Value> *[Code]* </S:Value>
>      <S:Subcode>
>       <S:Value> *[Subcode]* </S:Value>
>      </S:Subcode>
>    </S:Code>
>    <S:Reason>
>      <S:Text xml:lang="en"> *[Reason]* </S:Text>
>    </S:Reason>
>    <S:Detail>
>       *[Detail]*
>    </S:Detail>    
>   </S:Fault>
>  </S:Body>
> </S:Envelope> 
>
> The SOAP 1.1 fault is less expressive and map only *[Subcode]* and 
> *[Reason]*. These the properties bind to a SOAP 1.1 fault as follows:
>
> <S11:Envelope> 
>  <S11:Body>
>   <S11:Fault>
>    <faultcode> *[Subcode]* </faultcode>
>    <faultstring xml:lang="en"> *[Reason]* </faultstring>
>   </S11:Fault>
>  </S11:Body>
> </S11:Envelope> 
>
>
>       7.1 Fault Detail RetryAfter Element
>
> The following element is used to convey additional information in the 
> faults.
>
> /wse:RetryAfter
>
>     This element (whose content is of type xs:unsignedLong) is a
>     suggested minimum duration in milliseconds to wait before
>     retransmitting the message. Omission of this element indicates
>     that a retry is never likely to succeed.
>
> /wse:RetryAfter/@any
>
>     Optional extensibility attributes that do not affect processing.
>
>
>       7.2 DeliveryModeRequestedUnavailable
>
> This fault is sent when a Subscribe request specifies a delivery mode 
> that is not supported by the event source. Optionally, this fault may 
> contain a list of supported delivery mode URIs in the Detail property.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:DeliveryModeRequestedUnavailable
> *[Reason]* 	The requested delivery mode is not supported.
> *[Detail]* 	<wse:SupportedDeliveryMode> +
> /Optional; one per delivery mode supported by the receiver/
>
>
>       7.3 InvalidExpirationTime
>
> This fault is sent when a Subscribe request specifies an expiration 
> time that is in the past or an expiration duration of zero.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:InvalidExpirationTime
> *[Reason]* 	The expiration time requested is invalid.
> *[Detail]* 	/none/
>
>
>       7.4 UnsupportedExpirationType
>
> This fault is sent when a Subscribe request specifies an expiration 
> time and the event source is only capable of accepting expiration 
> durations; for instance, if the event source does not have access to 
> absolute time.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:UnsupportedExpirationType
> *[Reason]* 	Only expiration durations are supported.
> *[Detail]* 	/none/
>
>
>       7.5 FilteringNotSupported
>
> This fault is sent when a Subscribe request contains a filter and the 
> event source does not support filtering.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:FilteringNotSupported
> *[Reason]* 	Filtering is not supported.
> *[Detail]* 	/none/
>
>
>       7.6 FilteringRequestedUnavailable
>
> This fault is sent when a Subscribe request specifies a filter dialect 
> that the event source does not support. Optionally, this fault may 
> contain a list of supported filter dialect URIs in the Detail property.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:FilteringRequestedUnavailable
> *[Reason]* 	The requested filter dialect is not supported.
> *[Detail]* 	<wse:SupportedDialect> +
> /Optional; one per filter dialect supported by the receiver/
>
>
>       7.7 EventSourceUnableToProcess
>
> This fault is sent when the event source is not capable of fulfilling 
> a Subscribe request for local reasons unrelated to the specific request.
>
> *[Code]* 	s12:Receiver
> *[Subcode]* 	wse:EventSourceUnableToProcess
> *[Reason]* 	/Text explaining the failure; e.g., "The event source has 
> too many subscribers"./
> *[Detail]* 	<wse:RetryAfter> ? /(Optional)/
>
>
>       7.8 UnableToRenew
>
> This fault is sent when the event source is not capable of fulfilling 
> a Renew request for local reasons unrelated to the specific request.
>
> *[Code]* 	s12:Receiver
> *[Subcode]* 	wse:UnableToRenew
> *[Reason]* 	/Text explaining the failure; e.g., "The event source has 
> too many subscribers"./
> *[Detail]* 	<wse:RetryAfter> ? /(Optional)/
>
>
>       7.9 InvalidMessage
>
> If a request message does not comply with the corresponding outline 
> listed above, the request MUST fail and the event source or 
> subscription manager MAY generate the following fault indicating that 
> the request is invalid:
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:InvalidMessage
> *[Reason]* 	The message is not valid and cannot be processed.
> *[Detail]* 	/The invalid message/
>
>
>       7.10 DeliveryFormatRequestUnavailable
>
> This fault is sent when a Subscribe request specifies a delivery mode 
> that is not supported by the event source. Optionally, this fault may 
> contain a list of supported delivery mode URIs in the Detail property.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:DeliveryFormatRequestedUnavailable
> *[Reason]* 	The requested delivery format is not supported.
> *[Detail]* 	<wse:SupportedDeliveryFormat> +
> / Optional, one per delivery format supported by the receiver./
>
>
>       7.11 EmptyFilter
>
> This fault MAY be generated when an Event Source detects a 
> wse:Subscribe request containing a filter that, for whatever reason, 
> will never evaluate to true.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:EmptyFilter
> *[Reason]* 	The wse:Filter would result in zero Notifications.
> *[Detail]* 	/ The wse:Filter value. /
>
>
>       7.12 UnusableEPR
>
> This fault MAY be generated when an Event Source detects that the 
> wse:NotifyTo or wse:EndTo EPR is unusable.
>
> *[Code]* 	s12:Sender
> *[Subcode]* 	wse:UnusableEPR
> *[Reason]* 	An EPR in the Subscribe request message is unusable.
> *[Detail]* 	/ The specific EPR that generated the error and why. /
>
>
>     8 Security Considerations
>
>
>       8.1 Message Security
>
> It is strongly RECOMMENDED that the communication between services be 
> secured using the mechanisms described in WS-Security [WS-Security] 
> <#WSSecurity>. In order to properly secure messages, the body and all 
> relevant headers need to be included in the signature. Specifically, 
> any headers identified in the |<wse:NotifyTo>| element and standard 
> messaging headers, such as those from WS-Addressing [WS-Addressing] 
> <#AddrCore>, need to be signed with the body in order to "bind" the 
> two together. For messages with empty bodies, the |<s12:Body>| element 
> should be signed so content cannot be added in transit.
>
> Different security mechanisms may be desired depending on the 
> frequency of messages. For example, for infrequent messages, public 
> key technologies may be adequate for integrity and confidentiality. 
> However, for high-frequency events, it may be more performant to 
> establish a security context for the events using the mechanisms 
> described in WS-Trust [WS-Trust] <#WSTrust> and WS-SecureConversation 
> [WS-SecureConversation] <#WSSecureConversation>.
>
> It should be noted that if a shared secret is used it is RECOMMENDED 
> that derived keys be used to strengthen the secret as described in 
> WS-SecureConversation.
>
> The following list summarizes common classes of attacks that apply to 
> this protocol and identifies the mechanism to prevent/mitigate the 
> attacks:
>
>    *
>
>       Message alteration - Alteration is prevented by including
>       signatures of the message information using WS-Security.
>
>    *
>
>       Message disclosure - Confidentiality is preserved by encrypting
>       sensitive data using WS-Security.
>
>    *
>
>       Key integrity - Key integrity is maintained by using the
>       strongest algorithms possible (by comparing secured policies -
>       see WS-Policy [WS-Policy] <#WSPolicy> and WS-SecurityPolicy
>       [WS-SecurityPolicy] <#WSSecurityPolicy>).
>
>    *
>
>       Authentication - Authentication is established using the
>       mechanisms described in WS-Security and WS-Trust. Each message
>       is authenticated using the mechanisms described in WS-Security.
>
>    *
>
>       Accountability - Accountability is a function of the type of and
>       string of the key and algorithms being used. In many cases, a
>       strong symmetric key provides sufficient accountability.
>       However, in some environments, strong PKI signatures are required.
>
>    *
>
>       Availability - All reliable messaging services are subject to a
>       variety of availability attacks. Replay detection is a common
>       attack and it is RECOMMENDED that this be addressed by the
>       mechanisms described in WS-Security. Other attacks, such as
>       network-level denial of service attacks are harder to avoid and
>       are outside the scope of this specification. That said, care
>       should be taken to ensure that minimal state is saved prior to
>       any authenticating sequences.
>
>    *
>
>       Replay - Messages may be replayed for a variety of reasons. To
>       detect and eliminate this attack, mechanisms should be used to
>       identify replayed messages such as the timestamp/nonce outlined
>       in WS-Security. Alternatively, and optionally, other
>       technologies, such as sequencing, can also be used to prevent
>       replay of application messages.
>
>
>       8.2 Access Control
>
> It is important for event sources to properly authorize requests. This 
> is especially true for Subscribe requests, as otherwise the ability to 
> subscribe on behalf of a third-party event sink could be used to 
> create a distributed denial-of-service attack.
>
> Some possible schemes for validating Subscribe requests include:
>
>    *
>
>       Send a message to the event sink that describes the requested
>       subscription, and then wait for a confirmation message to be
>       returned by the event sink, before the event source accepts the
>       subscription request. While this provides strong assurance that
>       the event sink actually desires the requested subscription, it
>       does not work for event sinks that are not capable of sending a
>       confirmation, and requires additional logic on the event sink.
>
>    *
>
>       Require user authentication on the Subscribe request, and allow
>       only authorized users to Subscribe.
>
> Other mechanisms are also possible. Note that event sources that are 
> not reachable from the Internet have less need to control Subscribe 
> requests.
>
>
>     9 Implementation Considerations
>
> Implementations SHOULD generate expirations in subscribe and renew 
> request and response messages that are significantly larger than 
> expected network latency.
>
> Event sinks should be prepared to receive notifications after sending 
> a subscribe request but before receiving a subscribe response message. 
> Event sinks should also be prepared to receive notifications after 
> receiving an unsubscribe response message.
>
>
>     10 Acknowledgements
>
> This specification has been developed as a result of joint work with 
> many individuals and teams, including: Ashok Malhotra (Oracle Corp.), 
> Asir Vedamuthu (Microsoft Corp.), Bob Freund (Hitachi, Ltd.), Doug 
> Davis (IBM), Fred Maciel (Hitachi, Ltd.), Geoff Bullen (Microsoft 
> Corp.), Gilbert Pilz (Oracle Corp.), Greg Carpenter (Microsoft Corp.), 
> Jeff Mischkinsky (Oracle Corp.), Katy Warr (IBM), Li Li (Avaya 
> Communications), Mark Little (Red Hat), Prasad Yendluri (Software AG), 
> Sreedhara Narayanaswamy (CA), Sumeet Vij (Software AG), Vikas Varma 
> (Software AG), Wu Chou (Avaya Communications), Yves Lafon (W3C)
>
>
>     11 References
>
> RFC2119
>     Key words for use in RFCs to Indicate Requirement Levels
>     <http://www.ietf.org/rfc/rfc2119.txt> , S. Bradner, March 1997.
>     (See http://www.ietf.org/rfc/rfc2119.txt.)
> SOAP 1.1
>     Simple Object Access Protocol (SOAP) 1.1
>     <http://www.w3.org/TR/2000/NOTE-SOAP-20000508/> , D. Box, et al,
>     May 2000. (See http://www.w3.org/TR/2000/NOTE-SOAP-20000508/.)
> SOAP 1.2
>     SOAP Version 1.2 Part 1: Messaging Framework
>     <http://www.w3.org/TR/2003/REC-soap12-part1-20030624/> , M.
>     Gudgin, et al, June 2003. (See
>     http://www.w3.org/TR/2003/REC-soap12-part1-20030624/.)
> WS-Addressing
>     W3C Recommendation, "Web Services Addressing 1.0 (WS-Addressing)"
>     <http://www.w3.org/2005/08/addressing/> , May 2006. (See
>     http://www.w3.org/2005/08/addressing/.)
> WS-MetadataExchange
>     Web Services Metadata Exchange (WS-MetadataExchange)
>     <http://www.w3.org/2009/02/ws-mex> , K. Ballinger, et al,
>     September 2004. (See http://www.w3.org/2009/02/ws-mex.)
> WS-Policy
>     W3C Recommendation, "Web Services Policy 1.5 - Framework"
>     <http://www.w3.org/TR/ws-policy/> , September 2007. (See
>     http://www.w3.org/TR/ws-policy/.)
> WS-ReliableMessaging
>     Web Services Reliable Messaging Protocol (WS-ReliableMessaging)
>     <http://schemas.xmlsoap.org/ws/2005/02/rm> , R. Bilorusets, et al,
>     February 2005. (See http://schemas.xmlsoap.org/ws/2005/02/rm.)
> WS-SecureConversation
>     Web Services Secure Conversation Language (WS-SecureConversation)
>     <http://schemas.xmlsoap.org/ws/2005/02/sc> , S. Anderson, et al,
>     February 2005. (See http://schemas.xmlsoap.org/ws/2005/02/sc.)
> WS-Security
>     Web Services Security: SOAP Message Security 1.0
>     <http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0.pdf>
>     , A. Nadalin, et al, March 2004. (See
>     http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0.pdf.)
> WS-SecurityPolicy
>     Web Services Security Policy Language (WS-SecurityPolicy), Version
>     1.1 <http://schemas.xmlsoap.org/ws/2005/07/securitypolicy> , G.
>     Della-Libera, et al, July 2005. (See
>     http://schemas.xmlsoap.org/ws/2005/07/securitypolicy.)
> WS-Trust
>     Web Services Trust Language (WS-Trust)
>     <http://schemas.xmlsoap.org/ws/2005/02/trust> , S. Anderson, et
>     al, February 2005. (See http://schemas.xmlsoap.org/ws/2005/02/trust.)
> WSDL 1.1
>     Web Services Description Language (WSDL) 1.1
>     <http://www.w3.org/TR/2001/NOTE-wsdl-20010315> , E. Christensen,
>     et al, March 2001. (See http://www.w3.org/TR/2001/NOTE-wsdl-20010315.)
> XML Infoset
>     XML Information Set
>     <http://www.w3.org/TR/2004/REC-xml-infoset-20040204/> , J. Cowan,
>     et al, February 2004. (See
>     http://www.w3.org/TR/2004/REC-xml-infoset-20040204/.)
> XML Schema, Part 1
>     XML Schema Part 1: Structures
>     <http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/> , H.
>     Thompson, et al, October 2004. (See
>     http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/.)
> XML Schema, Part 2
>     XML Schema Part 2: Datatypes
>     <http://www.w3.org/TR/2004/REC-xmlschema-2-20041028/> , P. Biron,
>     et al, October 2004. (See
>     http://www.w3.org/TR/2004/REC-xmlschema-2-20041028/.)
> XPath 1.0
>     XML Path Language (XPath) Version 1.0
>     <http://www.w3.org/TR/1999/REC-xpath-19991116> , J. Clark, et al,
>     November 1999. (See http://www.w3.org/TR/1999/REC-xpath-19991116.)
>
>
>     A Service Metadata for Eventing
>
> In order to obtain the event-related metadata that describes a 
> service, the mechanisms described in WS-MetadataExchange 
> [WS-MetadataExchange] <#MEX> should be used. The GetMetadata operation 
> defined there allows WSDL and policy information to be retrieved. The 
> WSDL will contain annotations that identify a service as an event 
> source and that identify those messages that describe notification 
> messages. The policy will specify the delivery modes and filter types 
> supported by the event source.
>
> To indicate that notification and solicit-response operations within a 
> WSDL 1.1 portType are events exposed by an event source, this 
> specification defines an @wse:EventSource attribute to annotate the 
> portType for the event source. The normative outline for the 
> @wse:EventSource attribute is:
>
> <wsd:definitions ...> 
>   
>   <wsdl:import 
>     namespace="http://www.w3.org/2009/02/ws-evt" 
>     location=
>     "http://www.w3.org/2009/02/ws-evt/eventing.wsdl" /> 
>   
>  [<wsdl:portType  [wse:EventSource="/xs:boolean/"]?  >
>    [<wsdl:operation ...> 
>      [ 
>       [<wsdl:input .../>] | 
>       [<wsdl:output .../>] | 
>       [<wsdl:input .../> <wsdl:output .../>] | 
>       [<wsdl:output .../> <wsdl:input .../>] 
>      ] 
>     </wsdl:operation>]+ 
>   </wsdl:portType>]* 
> </wsdl:definitions> 
>
> The following describes additional, normative constraints on the 
> outline listed above:
>
> /wsdl:definitions/wsdl:portType/@wse:EventSource
>
>     If omitted, implied value is false.
>
> /wsdl:definitions/wsdl:portType/@wse:EventSource="true"
>
>     Indicates the portType supports the Subscribe operation and
>     indicates that notification and solicit-response operations of the
>     portType are events exposed by a service with a port bound to this
>     portType.
>
> Other components of the outline above are not further constrained by 
> this specification.
>
> For example, here is the WSDL 1.1 for a hypothetical storm warning 
> service that exposes a wind report event.
>
> <wsdl:definitions 
>     targetNamespace="http://www.example.org/oceanwatch" 
>     xmlns:tns="http://www.example.org/oceanwatch" 
>     xmlns:wse="http://www.w3.org/2009/02/ws-evt"  
>     xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"  
>     xmlns:xs="http://www.w3.org/2001/XMLSchema" > 
>   <wsdl:import 
>     namespace="http://www.w3.org/2009/02/ws-evt" 
>     location=
>     "http://www.w3.org/2009/02/ws-evt/eventing.wsdl" /> 
>   <wsdl:types> 
>     <xs:schema 
>       targetNamespace="http://www.example.org/oceanwatch" 
>       elementFormDefault="qualified" 
>       blockDefault="#all" > 
>       <xs:element name="WindReport" > 
>         <xs:complexType> 
>           <xs:sequence> 
>             <xs:element name="Date" type="xs:string" /> 
>             <xs:element name="Time" type="xs:string" /> 
>             <xs:element name="Speed" type="xs:string" /> 
>             <xs:element name="Location" type="xs:string" /> 
>             <xs:element name="County" type="xs:string" /> 
>             <xs:element name="State" type="xs:string" /> 
>             <xs:element name="Lat" type="xs:string" /> 
>             <xs:element name="Long" type="xs:string" /> 
>             <xs:element name="Comments" type="xs:string" /> 
>           </xs:sequence> 
>         </xs:complexType> 
>       </xs:element> 
>     </xs:schema> 
>   </wsdl:types> 
>   <wsdl:message name="WindMsg" > 
>     <wsdl:part name="body" element="tns:WindReport" /> 
>   </wsdl:message> 
>   <wsdl:portType name="Warnings" wse:EventSource="true" > 
>     <wsdl:operation name="WindOp" > 
>       <wsdl:output message="tns:WindMsg" /> 
>     </wsdl:operation> 
>   </wsdl:portType> 
> </wsdl:definitions> 
>
> As described here, to subscribe to events exposed by an event source, 
> a subscribing endpoint sends a Subscribe message to the endpoint 
> reference for the event source. If the Subscribe does not include a 
> filter, the event sink should expect to receive events defined by 
> notification operations within the portType and should expect to 
> receive and respond to events defined by solicit-response operations 
> within the portType.
>
> Editor's Note: We anticipate that this WSDL extension may change in 
> subsequent versions of this specification.
>
>
>     B XML Schema
>
> A normative copy of the XML Schema [XML Schema, Part 1] <#XMLSchema1>, 
> [XML Schema, Part 2] <#XMLSchema2> description for this specification 
> may be retrieved from the following address:
>
> http://www.w3.org/2009/02/ws-evt/eventing.xsd
>
> A non-normative copy of the XML schema is listed below for convenience.
>
> <xs:schema 
>   targetNamespace="http://www.w3.org/2009/02/ws-evt" 
>   xmlns:tns="http://www.w3.org/2009/02/ws-evt"
>   xmlns:wsa="http://www.w3.org/2005/08/addressing"
>   xmlns:xs="http://www.w3.org/2001/XMLSchema" 
>   elementFormDefault="qualified" 
>   blockDefault="#all">
>   
>   <xs:import 
>     namespace="http://www.w3.org/XML/1998/namespace" 
>     schemaLocation="http://www.w3.org/2001/xml.xsd" />
>   <xs:import
>     namespace="http://www.w3.org/2005/08/addressing"
>     schemaLocation="http://www.w3.org/2005/08/addressing/ws-addr.xsd" />
>  
>   <!-- Types and global elements -->
>   <xs:complexType name="DeliveryType" mixed="true">
>     <xs:sequence>
>       <xs:element ref="tns:NotifyTo" minOccurs="0" maxOccurs="1" />
>       <xs:any namespace="##other" processContents="lax" 
>               minOccurs="0" maxOccurs="unbounded" />
>     </xs:sequence>
>     <xs:attribute name="Mode" type="xs:anyURI" use="optional" 
>       default="http://http://www.w3.org/2009/02/ws-evt/DeliveryModes/Push" />
>     <xs:anyAttribute namespace="##other" processContents="lax" />
>   </xs:complexType>
>  
>   <xs:complexType name="FormatType" mixed="true">
>     <xs:sequence>
>       <xs:any namespace="##any" processContents="lax" 
>               minOccurs="0" maxOccurs="unbounded" />
>     </xs:sequence>
>     <xs:attribute name="Name" type="xs:anyURI" use="optional" 
>       default="http://http://www.w3.org/2009/02/ws-evt/DeliveryFormats/Unwrap" />
>     <xs:anyAttribute namespace="##other" processContents="lax" />
>   </xs:complexType>
>  
>   <xs:simpleType name="NonNegativeDurationType">
>     <xs:restriction base="xs:duration">
>       <xs:minInclusive value="P0Y0M0DT0H0M0S" />
>     </xs:restriction>
>   </xs:simpleType>
>  
>   <xs:simpleType name="ExpirationType">
>       <xs:union memberTypes="xs:dateTime 
>                 tns:NonNegativeDurationType" />
>   </xs:simpleType>
>  
>   <xs:complexType name="FilterType" mixed="true">
>     <xs:sequence>
>       <xs:any namespace="##other" processContents="lax" 
>               minOccurs="0" maxOccurs="unbounded" />
>     </xs:sequence>
>     <xs:attribute name="Dialect" type="xs:anyURI" use="optional" 
>       default="http://www.w3.org/TR/1999/REC-xpath-19991116" />
>     <xs:anyAttribute namespace="##other" processContents="lax" />
>   </xs:complexType>
>  
>   <xs:complexType name="LanguageSpecificStringType">
>     <xs:simpleContent>
>       <xs:extension base="xs:string">
>         <xs:attribute ref="xml:lang" />
>         <xs:anyAttribute namespace="##other" processContents="lax" />
>       </xs:extension>
>     </xs:simpleContent>
>   </xs:complexType>
>  
>   <xs:element name="NotifyTo" type="wsa:EndpointReferenceType" />
>  
>   <!-- Subscribe request -->
>   <xs:element name="Subscribe">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="EndTo" type="wsa:EndpointReferenceType" 
>                     minOccurs="0" />
>         <xs:element name="Delivery" type="tns:DeliveryType" />
>         <xs:element name="Format" type="tns:FormatType" 
>                     minOccurs="0" />
>         <xs:element name="Expires" type="tns:ExpirationType" 
>                     minOccurs="0" />
>         <xs:element name="Filter" type="tns:FilterType" 
>                     minOccurs="0" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <xs:element name="Identifier" type="xs:anyURI" />
>  
>   <!-- Subscribe response -->
>   <xs:element name="SubscribeResponse">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="SubscriptionManager" 
>                     type="wsa:EndpointReferenceType" />
>         <xs:element name="Expires" type="tns:ExpirationType" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- Used in a fault if there's an unsupported dialect -->
>   <xs:element name="SupportedDialect" type="xs:anyURI" />
>  
>   <!-- Used in a fault if there's an unsupported delivery mode -->
>   <xs:element name="SupportedDeliveryMode" type="xs:anyURI" />
>  
>   <!-- Used in a fault if there's an unsupported format name -->
>   <xs:element name="SupportedDeliveryFormat" type="xs:anyURI" />
>  
>   <!-- Renew request -->
>   <xs:element name="Renew">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="Expires" type="tns:ExpirationType" 
>                     minOccurs="0" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- Renew response -->
>   <xs:element name="RenewResponse">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="Expires" type="tns:ExpirationType" 
>                     minOccurs="0" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- GetStatus request -->
>   <xs:element name="GetStatus">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- GetStatus response -->
>   <xs:element name="GetStatusResponse">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="Expires" type="tns:ExpirationType" 
>                     minOccurs="0" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- Unsubscribe request -->
>   <xs:element name="Unsubscribe">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- Unsubscribe response -->
>   <xs:element name="UnsubscribeResponse">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <!-- SubscriptionEnd message -->
>   <xs:element name="SubscriptionEnd">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="Status"
>                     type="tns:OpenSubscriptionEndCodeType" />
>         <xs:element name="Reason" 
>                     type="tns:LanguageSpecificStringType" 
>                     minOccurs="0" maxOccurs="unbounded" />
>         <xs:any namespace="##other" processContents="lax" 
>                 minOccurs="0" maxOccurs="unbounded" />
>       </xs:sequence>
>       <xs:anyAttribute namespace="##other" processContents="lax" />
>     </xs:complexType>
>   </xs:element>
>  
>   <xs:simpleType name="SubscriptionEndCodeType">
>     <xs:restriction base="xs:anyURI">
>       <xs:enumeration value=
>   "http://www.w3.org/2009/02/ws-evt/DeliveryFailure" />
>       <xs:enumeration value=
>   "http://www.w3.org/2009/02/ws-evt/SourceShuttingDown" />
>       <xs:enumeration value=
>   "http://www.w3.org/2009/02/ws-evt/SourceCancelling" />
>     </xs:restriction>
>   </xs:simpleType>
>  
>   <xs:simpleType name="OpenSubscriptionEndCodeType">
>     <xs:union memberTypes="tns:SubscriptionEndCodeType xs:anyURI" />
>   </xs:simpleType>
>     
>   <!-- RetryAfter Fault Detail Element -->
>   <xs:element name="RetryAfter"  type="tns:RetryAfterType"/>
>   <xs:complexType name="RetryAfterType">
>     <xs:simpleContent>
>       <xs:extension base="xs:nonNegativeInteger">
>         <xs:anyAttribute namespace="##other" processContents="lax" />
>       </xs:extension>
>     </xs:simpleContent>
>   </xs:complexType>
>      
>   <xs:attribute name="EventSource" type="xs:boolean" />
>
>   <!-- Wrapped Events -->
>   <xs:complexType name="EventType" mixed="true">
>     <xs:sequence>
>       <xs:any namespace="##any" processContents="lax" minOccurs="0"
>               maxOccurs="unbounded"/>
>     </xs:sequence>
>     <xs:attribute name="actionURI" type="xs:anyURI" use="optional" />
>     <xs:anyAttribute namespace="##other" processContents="lax" />
>   </xs:complexType>
>   <xs:element name="Notify" type="tns:EventType" />
>
> </xs:schema> 
>
>
>     C WSDL
>
> A normative copy of the WSDL [WSDL 1.1] <#WSDL11> description can be 
> retrieved from the following address:
>
> http://www.w3.org/2009/02/ws-evt/eventing.wsdl
>
> A non-normative copy of the WSDL description is listed below for 
> convenience.
>
> <wsdl:definitions
>   targetNamespace="http://www.w3.org/2009/02/ws-evt"
>   xmlns:wsa="http://www.w3.org/2005/08/addressing"
>   xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata"
>   xmlns:wse="http://www.w3.org/2009/02/ws-evt" 
>   xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" 
>   xmlns:xs="http://www.w3.org/2001/XMLSchema" >
>
>   <wsdl:types>
>     <xs:schema>
>        <xs:import
>          namespace="http://www.w3.org/2009/02/ws-evt"
>          schemaLocation=
>   "http://www.w3.org/2009/02/ws-evt/eventing.xsd" />
>     </xs:schema>
>   </wsdl:types>
>   
>   <wsdl:message name="SubscribeMsg" >
>     <wsdl:part name="body" element="wse:Subscribe" />
>   </wsdl:message>
>   <wsdl:message name="SubscribeResponseMsg" >
>     <wsdl:part name="body" element="wse:SubscribeResponse" />
>   </wsdl:message>
>   
>   <wsdl:message name="RenewMsg" >
>     <wsdl:part name="body" element="wse:Renew" />
>   </wsdl:message>
>   <wsdl:message name="RenewResponseMsg" >
>     <wsdl:part name="body" element="wse:RenewResponse" />
>   </wsdl:message>
>   
>   <wsdl:message name="GetStatusMsg" >
>     <wsdl:part name="body" element="wse:GetStatus" />
>   </wsdl:message>
>   <wsdl:message name="GetStatusResponseMsg" >
>     <wsdl:part name="body" element="wse:GetStatusResponse" />
>   </wsdl:message>
>   
>   <wsdl:message name="UnsubscribeMsg" >
>     <wsdl:part name="body" element="wse:Unsubscribe" />
>   </wsdl:message>
>   <wsdl:message name="UnsubscribeResponseMsg" >
>     <wsdl:part name="body" element="wse:UnsubscribeResponse" />
>   </wsdl:message>
>  
>   <wsdl:message name="SubscriptionEnd" >
>     <wsdl:part name="body" element="wse:SubscriptionEnd" />
>   </wsdl:message>
>
>   <message name="notifyEvent">
>     <part name="parameter" element="tns:Notify"/>
>   </message>
>   
>   <wsdl:portType name="EventSource" >
>     <wsdl:operation name="SubscribeOp" >
>       <wsdl:input 
>         message="wse:SubscribeMsg"
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/Subscribe"/>
>       <wsdl:output 
>         message="wse:SubscribeResponseMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/SubscribeResponse"/>
>     </wsdl:operation>
>   </wsdl:portType>
>   
>   <wsdl:portType name="SubscriptionEndPortType" >
>     <wsdl:operation name="SubscriptionEnd" >
>       <wsdl:input 
>         message="wse:SubscriptionEnd" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/SubscriptionEnd"/>
>     </wsdl:operation>
>   </wsdl:portType>
>   
>   <wsdl:portType name="SubscriptionManager" >
>     <wsdl:operation name="RenewOp" >
>       <wsdl:input 
>         message="wse:RenewMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/Renew"/>
>       <wsdl:output 
>         message="wse:RenewResponseMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/RenewResponse"/>
>     </wsdl:operation>
>     <wsdl:operation name="GetStatusOp" >
>       <wsdl:input 
>         message="wse:GetStatusMsg"
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/GetStatus"/>
>       <wsdl:output 
>         message="wse:GetStatusResponseMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/GetStatusResponse"/>
>     </wsdl:operation>
>     <wsdl:operation name="UnsubscribeOp" >
>       <wsdl:input 
>         message="wse:UnsubscribeMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/Unsubscribe"/>
>       <wsdl:output 
>         message="wse:UnsubscribeResponseMsg" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/UnsubscribeResponse"/>
>     </wsdl:operation>
>   </wsdl:portType>
>
>   <portType name="WrappedSinkPortType">
>     <operation name="NotifyEvent">
>       <input message="tns:notifyEvent" name="NotifyEvent" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/WrappedSinkPortType/NotifyEvent"/>
>     </operation>
>   </portType>
> </wsdl:definitions>
>
>
>     D WSDL for Standard Wrapped Delivery
>
> If an Event Subscriber specifies the wrapped event delivery format 
> http://www.w3.org/2009/02/ws-evt/DeliveryFormats/Wrap in the Subscribe 
> request message, then the Event Sink MUST implement the following 
> abstract WSDL and the Event Source MUST send the Notification messages 
> wrapped in the element defined in the WSDL.
>
> <definitions 
>   xmlns="http://schemas.xmlsoap.org/wsdl/" 
>   xmlns:xs="http://www.w3.org/2001/XMLSchema" 
>   xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata"
>   xmlns:wsa="http://www.w3.org/2005/08/addressing/"
>   xmlns:tns="http://www.w3.org/2009/02/ws-evt" 
>   targetNamespace="http://www.w3.org/2009/02/ws-evt">
>   
>   <types>
>     <xs:schema 
>         targetNamespace="http://www.w3.org/2009/02/ws-evt">
>
>       <xs:complexType name="EventType" mixed="true"> 
>         <xs:sequence> 
>           <xs:any namespace="##any" processContents="lax" minOccurs="0"
>                   maxOccurs="unbounded"/> 
>         </xs:sequence> 
>         <xs:attribute name="actionURI" type="xs:anyURI" use="optional" /> 
>         <xs:anyAttribute namespace="##other" processContents="lax" /> 
>       </xs:complexType> 
>
>       <xs:element name="Notify" type="tns:EventType" />
>     </xs:schema>
>   </types>
>   
>   <message name="notifyEvent">
>     <part name="parameter" element="tns:Notify"/>
>   </message>
>   
>   <portType name="WrappedSinkPortType">
>     <operation name="NotifyEvent">
>       <input message="tns:notifyEvent" name="NotifyEvent" 
>         wsam:Action="http://www.w3.org/2009/02/ws-evt/WrappedSinkPortType/NotifyEvent"/>
>     </operation>
>   </portType>
> </definitions>
>
>
>     E XML Schema for NotificationDescriptions
>
> A normative copy of the XML Schema [XML Schema, Part 1] <#XMLSchema1>, 
> [XML Schema, Part 2] <#XMLSchema2> description for the 
> NotificationDescriptions element may be retrieved from the following 
> address:
>
> http://www.w3.org/2009/02/ws-evt/notificationDescriptions.xsd <http://www.w3.org/2009/02/ws-evt/eventing.xsd>
>       
>
> A non-normative copy of the XML schema is listed below for convenience.
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>            targetNamespace="http://www.w3.org/2009/02/ws-evt"
>            elementFormDefault="qualified" attributeFormDefault="unqualified">
>   <xs:element name="notificationDescriptions">
>     <xs:complexType>
>       <xs:sequence>
>         <xs:element name="types">
>           <xs:annotation>
>             <xs:documentation>Data type definitions that are relevant to described notifications.</xs:documentation>
>           </xs:annotation>
>           <xs:complexType>
>             <xs:sequence>
>               <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
>             </xs:sequence>
>             <xs:anyAttribute namespace="##other" processContents="lax"/>
>           </xs:complexType>
>         </xs:element>
>         <xs:element name="notificationType" maxOccurs="unbounded">
>           <xs:complexType>
>             <xs:sequence>
>               <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
>             </xs:sequence>
>             <xs:attribute name="name" type="xs:NCName" use="required"/>
>             <xs:attribute name="element" type="xs:QName" use="required"/>
>             <xs:attribute name="action" type="xs:anyURI" use="required"/>
>             <xs:anyAttribute namespace="##other" processContents="lax"/>
>           </xs:complexType>
>         </xs:element>
>         <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
>       </xs:sequence>
>       <xs:attribute name="targetNamespace" type="xs:anyURI" use="required"/>
>       <xs:anyAttribute namespace="##other" processContents="lax"/>
>     </xs:complexType>
>   </xs:element>
> </xs:schema>
>       
>
>
>     F Rules for Generating WSDL from NotificationDescriptions
>
> Given a schema-valid NotificationDescriptions element, it is possible 
> to generate a WSDL description of a service that can process 
> Notifications with some or all of the Notification Types described 
> within that element by adhering to the following rules:
>
>    1. The value of /wsdl:portType/@name, /wsdl:binding/@name,
>       /wsdl:service/@name, and /wsdl:service/wsdl:port/@name are
>       arbitrary.
>    2. The value of the /wsdl:definitions/@targetNamespace attribute is
>       copied from the /wse:NotificationDescriptions/@targetNamespace
>       attribute.
>    3. The value of the /wsdl:definitions/wsdl:types element is copied
>       from the /wse:NotificationDescriptions/wse:types.
>    4. "Selected" /wse:NotificationDescriptions/wse:notificationType
>       elements map to individual /wsdl:messages. "Selected" refers to
>       the fact that there may be a filter applied to the subscription
>       which selects a subset of the Notification Types described in
>       the wse:NotificationDescriptions. The Event Sink is only
>       required to support (i.e. define operations for) those
>       Notification Types that will be transmitted to it by the Event
>       Source after filtering has occurred.
>           * the value of /wsdl:message/@name is generated from the
>             wse:notificationType/@name with "Msg" appended.
>           * all wsdl:messages have a single wsdl:part element (named
>             "event") with the @element attribute equal to the value of
>             wse:notificationType/@element attribute
>    5. Selected /wse:NotificationDescriptions/wse:notificationType
>       elements map to individual wsdl:operations in an auto-generated
>       wsdl:portType.
>           * the name of the wsdl:operation is generated from the
>             wse:notificationType/@name with "Op" appended
>           * the wsdl:operation has a wsdl:input which is the message
>             defined in (4) and no wsdl:output or wsdl:fault elements
>           * each wsdl:operation has a @wsam:Action attribute with a
>             value equal to the value of the
>             wse:notificationType/@actionURI attribute
>    6. Selected /wse:NotificationDescriptions/wse:notificationType
>       elements map to individual wsdl:operations in an auto-generated
>       wsdl:binding.
>           * the auto-generated wsdl:binding MUST be a Doc/literal
>             style SOAP binding
>           * the version of SOAP used for this binding may be supplied
>             as a parameter to the WSDL generation process (e.g. as an
>             argument to a tool which converts the
>             NotificationDescriptions to a WSDL)
>           * for SOAP 1.1 bindings the soap:Operation/@soapAction
>             attribute for each operation is set to the empty string ("")
>           * for SOAP 1.2 bindings the soap:Operation/@soapAction
>             attribute is omitted
>
> For example, the NotificationDescriptions element in Example 6-2 
> <#Table15> would, via the above rules, generate the following WSDL 
> description:
>
> Example F-1: Generated WSDL
> (01) <wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
> (02)                   *targetNamespace="http://www.example.org/oceanwatch/notifications"*
> (03)                   xmlns:xs="http://www.w3.org/2001/XMLSchema"
> (04)                   xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
> (05)                   xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata"
> (06)                   xmlns:ow="http://www.example.org/oceanwatch"
> (07)                   xmlns:tns="http://www.example.org/oceanwatch/notifications">
> (08)   <wsdl:types>
> (09)     *<xs:schema targetNamepace="http://www.example.org/oceanwatch">*
> (10)       *<xs:include schemaLocation="http://www.example.org/schemas/oceanwatch.xsd"/>*
> (11)       *<xs:element name="WindReport" type="ow:WindReportType">*
> (12)     *</xs:schema>*
> (13)   </wsdl:types>
> (14)
> (15)   <wsdl:message name="*WindReportNotificationMsg*">
> (16)     <wsdl:part name="event" element="*ow:WindReport*"/>
> (17)   </wsdl:message>
> (18)
> (19)   <wsdl:portType name="AutoGenPortType28d7">
> (20)     <wsdl:operation name="*WindReportNotificationOp*">
> (21)       <wsdl:input message="tns:WindReportNotificationMsg"
> (22)                   *wsam:Action="http://www.example.org/oceanwatch/2003/WindReport"*/>
> (23)     </wsdl:operation>
> (24)   </wsdl:portType>
> (25)
> (26)   <wsdl:binding name="AutoGenBinding28d7" type="tns:AutoGenPortType28d7">
> (27)     <soap:binding *style="document"* transport="http://schemas.xmlsoap.org/soap/http"/>
> (28)     <wsdl:operation name="*WindReportNotificationOp*">
> (29)       <soap:operation *soapAction=""*/>
> (30)       <wsdl:input>
> (31)         <soap:body *use="literal"*/>
> (32)       </wsdl:input>
> (33)     </wsdl:operation>
> (34)   </wsdl:binding>
> (35)
> (36)   <wsdl:service name="AutoGenService28d7">
> (37)     <wsdl:port name="AutoGenPort28d7" binding="tns:AutoGenBinding28d7">
> (38)       <soap:address location="http://www.cranium.org/subListeners/28d7"/>
> (39)     </wsdl:port>
> (40)   </wsdl:service>
> (41) </wsdl:definitions>
>       
>
>
>     G Change Log
>
> Data 	Author 	Description
> 2009/03/04 	DD 	Added resolution of issue 6391 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6391>
> 2009/03/04 	DD 	Added resolution of issue 6519 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6519>
> 2009/03/04 	DD 	Added resolution of issue 6427 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6427>
> 2009/03/04 	DD 	Added resolution of issue 6459 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6459>
> 2009/03/09 	DD 	Added resolution of issue 6397 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6397>
> 2009/03/09 	DD 	Added resolution of issue 6426 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6426>
> 2009/03/11 	DD 	Added change log
> 2009/03/11 	DD 	Added resolution of issue 6641 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6641>
> 2009/03/11 	DD 	Added resolution of issue 6498 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6498>
> 2009/03/11 	DD 	Added resolution of issue 6425 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6425>
> 2009/03/16 	KW 	Added resolution of issue 6587 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6587>
> 2009/03/17 	KW 	Added resolution of issue 6400 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6400>
> 2009/03/17 	DD 	Added resolution of issue 6428 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6428>
> 2009/03/17 	DD 	Added resolution of issue 6687 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6687>
> 2009/03/23 	DD 	Added resolution of issue 6666 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6666>
> 2009/03/23 	DD 	Added resolution of issue 6681 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6681>
> 2009/03/24 	DD 	Added resolution of issue 6595 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6595>
> 2009/03/24 	DD 	Added resolution of issue 6648 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6648>
> 2009/04/07 	DD 	Added resolution of issue 6727 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6727>
> 2009/04/07 	DD 	Added resolution of issue 6725 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6725>
> 2009/04/07 	DD 	Added resolution of issue 6715 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6715>
> 2009/04/22 	KW 	Added resolution of issue 6739 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6739>
> 2009/04/28 	DD 	Added resolution of issue 6787 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6787>
> 2009/04/28 	DD 	Added resolution of issue 6788 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6788>
> 2009/05/13 	KW 	Added resolution of issue 6472 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6472>
> 2009/05/13 	DD 	Added resolution of issue 6850 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6850>
> 2009/05/13 	DD 	Added resolution of issue 6696 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6696>
> 2009/05/19 	DD 	Added resolution of issue 6907 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6907>
> 2009/05/19 	DD 	Added resolution of issue 6429 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6429>
> 2009/05/21 	DD 	Added resolution of issue 6674 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6674>
> 2009/05/27 	DD 	Added resolution of issue 6906 
> <http://www.w3.org/Bugs/Public/show_bug.cgi?id=6906>
>




Received on Monday, 20 July 2009 22:47:05 GMT

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