Any web service operation that you import for a web service source or target definition must have the proper encoding, web service operation type, and input or output messages. You can import all web service operations with the following characteristics:
Specifies the request-response type for web service source definitions or web service target definitions. PowerExchange for Web Services also supports the one-way type for web service targets only.
Contains either RPC/encoded or document/literal SOAP encoding style.
WSDL file specifies either the HTTP or HTTPS transport protocol.
If the web service operation that you want to import differs from this list of supported characteristics, you cannot import it.