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Explain WS Reliability (Web services).

WS-Reliability is a specification for open, reliable Web services messaging, including guaranteed delivery, eliminating duplicate message and message ordering, that enables reliable communication between Web services.

The reliability features are based on extensions to the Simple Object Access Protocol (SOAP), rather than being tied to the underlying transport protocol. The specification will allow a variety of systems to interoperate reliably in a platform and vendor neutral manner.

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