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Java™ Web Services Unleashed by Mark Wutka, Joseph Weber, Arthur Ryman, K. Scott Morrison, Benoît Marchal, Matthias Kloppmann, Steven Haines, Darren Govoni, Francisco Curbera, Frank Cohen, Robert Brunner

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WSDL File

WSIF makes use of WSDL to describe a service as a network endpoint that both acts on and produces messages. Services are characterized abstractly (that is, independent of language, transport, or protocol) and concretely (which incorporates specific bindings to all of these). Ariba, IBM, and Microsoft introduced WSDL in late 2000, and the current version, 1.1, is quite lucidly specified in a W3C note. WSDL, a fascinating and powerful technology, is the topic of Chapter 11 in this book. It is highly recommended that you review this chapter if you are unfamiliar with WSDL.

Listing 19.6 shows the abstract definition of the Java implementation of the TimeServer. The port type element aggregates operations, which are groupings of functionally ...

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