High Quality Content by WIKIPEDIA articles! The Web Services Description Language (WSDL, pronounced 'wiz-del') is an XML-based language that provides a model for describing Web services. The meaning of the acronym has changed from version 1.1 where the D stood for Definition.The current version of the specification is 2.0; version 1.1 has not been endorsed by the W3C but version 2.0 is a W3C recommendation. WSDL 1.2 was renamed WSDL 2.0 because of its substantial differences from WSDL 1.1. By accepting binding to all the HTTP request methods (not only GET and POST as in version 1.1) WSDL 2.0 specification offers better support for RESTful web services, and is much simpler to implement. However support for this specification is still poor in software development kits for Web Services which often offer tools only for WSDL 1.1.

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