Chapter 5. Conversations
While WSDL is a capable technology for describing the static aspects of a Web service's interface, it does little in the way of prescribing the ordering of its operations. For a Web service to be truly self-describing, it requires both static and interactive aspects of the interface to be understood by its consumers—that is, how to “converse” with the service over successive invocations.
In the Web services arena, the first technology submitted to a standards body for describing the interactive behavioral aspects of a Web service is the Web Services Conversation Language (or WSCL). WSCL captures the conversation pattern that a Web service is expecting to engage in by describing the order in which its WSDL-described operations ...
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