WSDL
Web Services Description Language
http://en.wikipedia.org/wiki/Web_Services_Description_Language WSDL is an XML-based service description on how to communicate using the web service; namely, the protocol bindings and message formats required to interact with the web services listed in its directory. The supported operations and messages are described abstractly, and then bound to a concrete network protocol and message format. This means that WSDL describes the public interface to the web service.
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