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abstractws-addressing provides transport-neutral mechanisms to address web services and messages. specifically, this specification defines xml [xml 1.0, xml namespaces] elements to identify web service endpoints and to secure end-to-end endpoint identification in messages. this specification enables messaging systems to support message transmission through networks that include processing nodes such as endpoint managers, firewalls, and gateways in a transport-neutral manner.
statusws-addressing and related specifications are provided as-is and for review and evaluation only. bea, ibm, microsoft, sap, and sun make no warrantees or representations regarding the specifications in any manner whatsoever.
table of contents1. introduction
1.1 notational conventions
1.2 namespaces
2. endpoint references
2.1 information model for endpoint references
2.2 endpoint reference xml infoset representation
2.3 binding endpoint references
2.4 endpoint reference comparison
3. message information headers
3.1 message information headers xml infoset representation
3.2 formulating a reply message
3.3 associating action with wsdl operations
3.3.1 explicit association
3.3.2 default action pattern
4. faults
4.1 invalid message information header
4.2 message information header required
4.3 destination unreachable
4.4 action not supported
4.5 endpoint unavailable
5. security considerations
6. acknowledgements
7. references
1. introductionweb services addressing (ws-addressing) defines two interoperable constructs that convey information that is typically provided by transport protocols and messaging systems. these constructs normalize this underlying information into a uniform format that can be processed independently of transport or application. the two constructs are endpoint references and message information headers.
a web service endpoint is a (referenceable) entity, processor, or resource where web service messages can be targeted. endpoint references convey the information needed to identify/reference a web service endpoint, and may be used in several different ways: endpoint references are suitable for conveying the information needed to access a web service endpoint, but are also used to provide addresses for individual messages sent to and from web services. to deal with this last usage case this specification defines a family of message information headers that allows uniform addressing of messages independent of underlying transport. these message information headers convey end-to-end message characteristics including addressing for source and destination endpoints as well as message identity.
both of these constructs are designed to be extensible and re-usable so that other specifications can build on and leverage endpoint references and message information headers.
the following example illustrates the use of these mechanisms in a soap 1.2 message being sent from http://business456.example/client1 to http://fabrikam123.example/purchasing:
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