WS-Addressing
From Wikipedia, the free encyclopedia
WS-Addressing is a specification of a mechanism to allow web services to communicate addressing information. It essentially consists of two parts: a structure for communicating a reference to a Web service endpoint, and a set of Message Addressing Properties, which associate addressing information with a particular message.
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[edit] Endpoint References
An Endpoint Reference (EPR) is an XML structure encapsulating information useful for addressing a message to a Web service. This includes the destination address of the message, any additional parameters (called reference parameters) necessary to route the message to the destination, and optional metadata (such as WSDL or WS-Policy) about the service.
[edit] Message Addressing Properties
Message Addressing Properties communicate addressing information relating to the delivery of a message to a Web service:
- Message destination URI
- Source endpoint -- the endpoint of the service that dispatched this message (EPR)
- Reply endpoint -- the endpoint to which reply messages should be dispatched (EPR)
- Fault endpoint -- the endpoint to which fault messages should be dispatched (EPR)
- Action -- an action value indicating the semantics of the message (may assist with routing the message) URI
- Unique message ID URI
- Relationship to previous messages (A pair of URIs)
[edit] History
WS-Addressing was originally authored by Microsoft, IBM, BEA, Sun, and SAP and submitted to W3C for standardization. The W3C WS-Addressing Working Group has refined and augmenting the specification in the process of standardization.
WS-Addressing is currently specified in three parts:
- The Core specification of Endpoint References and Message Addressing Properties.
- A binding of these properties to SOAP.
- A description of WS-Addressing use and property values in WSDL.
