HOME HTML CSS XML JAVASCRIPT ASP PHP SQL MORE...

SOAP Tutorial

SOAP HOME
SOAP Intro
SOAP Syntax
SOAP Envelope
SOAP Header
SOAP Body
SOAP Fault
SOAP HTTP Binding
SOAP Example
SOAP Summary

SOAP Syntax

« Previous

Next Chapter »

SOAP Building Blocks

A SOAP message is an ordinary XML document containing the following elements:

An Envelope element that identifies the XML document as a SOAP message
A Header element that contains header information
A Body element that contains call and response information
A Fault element containing errors and status information

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

Syntax Rules

Here are some important syntax rules:

A SOAP message MUST be encoded using XML
A SOAP message MUST use the SOAP Envelope namespace
A SOAP message MUST use the SOAP Encoding namespace
A SOAP message must NOT contain a DTD reference
A SOAP message must NOT contain XML Processing Instructions

Skeleton SOAP Message

<?xml version="1.0"?>
<soap:Envelope
xmlns:soap="http://www.w3.org/2001/12/soap-envelope"
soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">

<soap:Header>
...
</soap:Header>

<soap:Body>
...
<soap:Fault>
...
</soap:Fault>
</soap:Body>

</soap:Envelope>