What are components of WSDL?

An WSDL document describes a web service. It specifies the location of the service, and the methods of the service, using these major elements:

Element      Description

     Defines the (XML Schema) data types used by the web service

  Defines the data elements for each operation

   Describes the operations that can be performed and the messages involved.

   Defines the protocol and data format for each port type