I am not sure exactly what you are trying to accomplish. Are you just trying to create Pega data classes without manually creating the properties through the create properties wizard in Pega? or are you trying to do some sort of integration with external data? If you need this for a soap service for instance the Soap service wizard will create the request and response data classes for you based on the wsdl.
Cecil Howell, CSA | Senior Instructor | Pegasystems Inc.
If you are trying to integrate with Java or .Net you do not need to use SOAP we have native connectors for both, Java connector and dotNet connector. Not sure what what version you are using but Pega 7 has a nice wizard to help you out, it is found under the create other integration as shown below.