What is SOAP?
SOAP is the Simple Object Access Protocol. It is used for information exchange and RPC, usually (but not necessarily) over HTTP. More information can be found at:
Developmentor SOAP FAQ: http://www.soaprpc.com/faqs/SoapFAQ.html
W3C specifications: http://www.w3.org/TR/SOAP/
What is WSDL?
WSDL is the Web Service Description Language. It provides a formal description of a web service, much like CORBA's IDL. The WSDL file is all you need to know how to call the web service; toolkits can generate proxy code from a WSDL file directly. The official WSDL definition is at http://www.w3.org/TR/wsdl.
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