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Web service

A Web service is a body of solution logic that provides a physically decoupled technical contract consisting of a WSDL definition, an XML schema definition, and possibly a WS-Policy definition. This service contract exposes public functions (called operations) and is therefore comparable to a traditional application programming interface (API).

The logic encapsulated by a Web service does not need to be customized or component-based. Legacy application logic, for example, can be exposed via Web service contracts through the use of service adapter products. When custom-developed, Web service logic is typically based on the use of modern component technologies, such as Java and .NET. In this case, the components are further qualified as core service logic.

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