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WS-Addressing
Web Services Addressing (WS-Addressing) is a specification of transport-neutral mechanism that allows 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.
== Description ==
WS-Addressing is a standardized way of including message routing data within SOAP headers. Instead of relying on network-level transport to convey routing information, a message utilizing WS-Addressing may contain its own dispatch metadata in a standardized SOAP header. The network-level transport is only responsible for delivering that message to a dispatcher capable of reading the WS-Addressing metadata. Once that message arrives at the dispatcher specified in the URI, the job of the network-level transport is done.
WS-Addressing supports the use of asynchronous interactions by specifying a common SOAP header (wsa:ReplyTo) that contains the endpoint reference (EPR) to which the response is to be sent. The service provider transmits the response message over a separate connection to the wsa:ReplyTo endpoint. This decouples the lifetime of the SOAP request/response interaction from the lifetime of the HTTP request/response protocol, thus enabling long-running interactions that can span arbitrary periods of time.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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