1. The Simple Object Access Protocol
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2. Sources of Information
SOAP Tutorial,
SoapRPC.com: Tutorials, ( A Busy Developer’s Guide To Soap1.1
DaveNet : XML-RPC for Newbies,
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3. Introduction
“SOAP is a Remote Procedure Calling protocol that works over HTTP.
The body of the request is in XML. A procedure executes on the server and the value it returns is also formatted in XML.
Procedure parameters and returned values can be scalars, numbers, strings, dates, etc.; and can also be complex record and list structures.” (- A Busy Developer’s Guide To Soap1.1)
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4. Remote Procedure Call using HTTP
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5. Example of a SOAP request
POST /examples HTTP/1.1 User-Agent: Radio UserLand/7.0 (WinNT) Host: localhost:81 Content-Type: text/xml; charset=utf-8 Content-length: 474 SOAPAction: "/examples" <?xml version="1.0"?> <SOAP-ENV:Envelope SOAP-ENV:encodingStyle=
" xmlns:
SOAP-ENC=" xmlns:
SOAP-ENV=" xmlns:xsd=" xmlns:xsi=" <SOAP-ENV:Body>        <m:getStateName xmlns:m="          <statenum xsi:type="xsd:int">41</statenum>          </m:getStateName>  </SOAP-ENV:Body>  </SOAP-ENV:Envelope>
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6. An Example SOAP Request
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7. Response example 
HTTP/ OK Connection: close Content-Length: 499 Content-Type: text/xml; charset=utf-8 Date: Wed, 28 Mar :05:04 GMT Server: UserLand Frontier/7.0-WinNT <?xml version="1.0"?> <SOAP-ENV:Envelope SOAP-ENV:encodingStyle=" xmlns:SOAP-ENC=" xmlns:SOAP-ENV=" xmlns:xsd=" xmlns:xsi="    <SOAP-ENV:Body>       <m:getStateNameResponse xmlns:m="          <Result xsi:type="xsd:string">South Dakota</Result>          </m:getStateNameResponse>       </SOAP-ENV:Body>    </SOAP-ENV:Envelope>
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8. Response example 
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9. Error Example
HTTP/ Server Error Connection: close Content-Length: 511 Content-Type: text/xml; charset=utf-8 Date: Wed, 28 Mar :06:32 GMT Server: UserLand Frontier/7.0-WinNT <?xml version="1.0"?> <SOAP-ENV:Envelope SOAP-ENV:encodingStyle=" xmlns:SOAP-ENV=" xmlns:xsd=" xmlns:xsi="    <SOAP-ENV:Body>       <SOAP-ENV:Fault>          <faultcode>SOAP-ENV:Client</faultcode>          <faultstring>Can't call getStateName because there are too many parameters.</faultstring>          </SOAP-ENV:Fault>       </SOAP-ENV:Body>    </SOAP-ENV:Envelope>
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10. Error Example
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