The WSDL Schema tab in the component property sheet includes a text zone that contains some shared schema definitions from the WSDL schema. This part of the schema defines the data types used by the input, output and fault messages.
The other part of the schema is defined within the different Web methods (operations) as SOAP input message data types, SOAP output message data types, and SOAP fault data types.
For more information on the other part of the WSDL schema, see Defining SOAP data types of the WSDL schema.