SOAP message is an ordinary XML document containing the following elements:
•A required Envelope element that identifies the XML document as a SOAP message
•An optional Header element that contains header information
•A required Body element that contains call and response information
•An optional Fault element that provides information about errors that occurred while processing the message All the elements above are declared in the default namespace for the SOAP envelope:
http://www.w3.org/2001/12/soap-envelope
and the default namespace for SOAP encoding and data types is:
http://www.w3.org/2001/12/soap-encoding
