WS-Addressing Action header.
The XMLFORMAT parameter controls the generation of the XMLExport and XMLImport methods for XML enabled classes to include code for only literal or only encoded format. This allows the generated routines to be significantly smaller since usually both formats are not needed.
If XMLFORMAT="Literal", then only support for literal format import and export is generated.
If XMLFORMAT="Encoded", then only support for SOAP encoded format import and export is generated.
The default is to generate support for both literal and encoded format.