The SOAP body
The <Body> is the mandatory element in the SOAP envelope, in which the main end-to-end information conveyed in a SOAP message is carried.
The <Body> element and its associated child elements are used to exchange information between the initial SOAP sender and the ultimate SOAP receiver. SOAP defines one child element for the <Body>: the <Fault> element, which is used for reporting errors. Other elements in the <Body> are defined by the web service that uses them.