2.2.4.3 Method Name Encoding
As specified in [SOAP1.1] section 7, the Remoting Method MUST be mapped to a SOAP struct. The name of the struct MUST be a qualified name and MUST be distinct for request and response. An implementation MUST define its own mechanism to derive the XML namespace and local name for the request and response. The client and the server MUST agree on the mechanism so that a given method ends up with the same qualified names on both sides.<27>