WSDL stands for Web Service Description Language and is an XML standard for describing which Web Service operations are available from a particular server.
In the case of Presence Web Service Tasks (i.e. Tasks that are made available to the outside world as Web Services) the operations exposed by the WSDL depend on the URL called, and this is related to the Presence Category structure. Calling the following URL:
will display all Web Services available from Presence, as "Presence" is the root Category.
The available services can be restricted by appending sub categories, of the form:
Space characters are always replaced by underscores (_).