The SOAP Message
If you are eager to start coding your own SOAP applications, you may want to skip ahead to the Section 3.6 section, later in this chapter. Otherwise, the following section provides additional details regarding the SOAP specification itself.
A one-way message, a request from a client, or a response from a
server is officially referred to as a SOAP
message. Every SOAP message has a mandatory
Envelope
element, an optional
Header
element, and a mandatory
Body
element. (See Figure 3-2.)
Each of these elements has an associated set of rules, and
understanding the rules will help you debug your own SOAP
applications.
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