WSDL Version 1.1

Web Services Description Language (WSDL) is an XML format for describing network services as a set of endpoints operating on messages containing either document-oriented or procedure-oriented information.

The operations and messages are described abstractly, then bound to a concrete network protocol and message format to define an endpoint. Related concrete end points are combined into abstract endpoints (services).

WSDL is extensible to allow the description of endpoints and their messages regardless of what message formats or network protocols are used to communicate. The WSDL 1.1 specification only defines bindings that describe how to use WSDL in conjunction with:

SOAP 1.1
HTTP GET
HTTP POST
MIME

The specification for WSDL 1.1 is published by the World Wide Web Consortium (W3C) as a W3C Note at WSDL Version 1.1.

World Wide Web Consortium (W3C)
WSDL Version 1.1