The SOAP <Body> is a mandatory sub-element of the SOAP envelope, which contains information intended for the ultimate recipient of the message.
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 within the <Body> are defined by the Web service that uses them.