SOAP encodeding style is defined by the infamous chapter 5 of the SOAP-1.1 specification. It has inherent interoperability issues that cannot be fixed. The Basic Profile-1.0 prohibits this encoding style in 4.1.7 SOAP encodingStyle Attribute. JBossWS has basic support for rpc/encoded that is provided as is for simple interop scenarios with SOAP stacks that do not support literal encoding. Specifically, JBossWS does not support:-