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Using WS-Addressing To Perform Asynchronous Web Service Calls
Hayward J, Phippen AD
Advances in Network & Communication Engineering 3, pp223-231, 2006
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The Simple Object Access Protocol (SOAP) specification does not define an asynchronous message exchange pattern for web services. Business Process Execution Language (BPEL), however, does provide a mechanism for using web services asynchronously, but it relies on hard-coding the end points for the request and the response. This results in tight coupling between the client and the service. WS-Addressing provides a mechanism for defining end points and relating messages with each other. By using the Microsoft Web Service Enhancements the project proposes a mechanism with which web service responses can be routed to an available application using information defined with the WS-Addressing specification. This mechanism loosens the coupling between the client and service and can improve system reliability.

Hayward J, Phippen AD