According to WSDL file and the mapping rule required by DII
Invoker, define the Contexts and related Data elements. The definition
of Contexts and Data elements, like the value of ID, the structure
of Data elements, is decisive to success of data mapping. On the beginning
of invocation, DII Invoker parse the WSDL file into the inside model
and cache the model for later use, which improves the performance of whole application. The model includes everything that WSDL described. DII Invoker gets the parameter information of the Web service operation from the parsed model and makes use of parameter information to transform Context to WSDL data. After the invocation, DII Invoker will transform the return
data back to Context.