A SOAP message consists of a header and a body, both of which are contained in a SOAP envelope. Generally, the SOAP request message contains no header information, but the response message corresponding to the previous request message contains a header and does not necessarily show the body of the message..
For more detailed information on SOAP, refer to the following documents:
Simple Object Access Protocol (1.1): http://www.w3.org/TR/SOAP/
Simple Object Access Protocol (1.2) Part 1: http://www.w3.org/TR/soap12-part1/
Simple Object Access Protocol (1.2) Part 2: http://www.w3.org/TR/soap12-part2/
