WSDL (Web Services Description Language) is an XML vocabulary
that defines the software interfaces for web services. It organizes all
of the web service technical details required for automatic integration at the
programming level, and is used to publish IBM WebSphere collaborations as web
services. WSDL is to web services as IDL is to CORBA objects.
For more information on WSDL, go to:
http://www.w3.org/TR/wsdl