Chapter 3. Describing Web Services: WSDL

Web services expose a software-oriented view of a business or consumer function with which applications may interact over the network. To successfully enable such an interaction using a Web service, it must be described and advertised to its potential consumers. Furthermore, users must be able to find out about how to interact with the service: what data it expects to receive, whether it delivers any results, and what communication protocol or transport it supports.

In a somewhat primitive form, Web services have been around for a long time. It's possible to send a search string or a stock quote request by appending information to URLs. However, this format is of limited usefulness and scope for many reasons, ...

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