The BPEL4WS Basics
It's the rule of BPEL4WS to define a new Web service by composing a set of existing services through a process integration-type mechanism with common language control. BPEL4WS is basically a language design to implement the compilation of processes that indicate how the services interface abstractions into the overall execution of the process composition. Indeed, it's designed to be a standard language for process integration. The interface is described as a collection of WSDL portTypes, as is any other Web service (for more information on WSDL, see Chapter 15).
BPEL4WS leverages the concept of message properties used to identify relevant data embedded in messages. Using this mechanism, properties may be viewed in two ways: ...
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