What Is SOAP?
SOAP is the acronym for Simple Object Access Protocol. SOAP is a lightweight protocol used for exchanging data in a distributed environment, similar to portions of CORBA and DCOM, but with less functionality and resulting overhead. SOAP exchanges data using XML documents, using HTTP (or HTTPS) for its communications. A specification on SOAP is available for reference on the Internet at http://www.w3.org/TR/SOAP/.
Web Services also use a form of XML to instruct users about themselves, called WSDL. WSDL is short for Web Services Description Language. WSDL is used by client applications to identify what a Web service can do, where it can be found, and how to call it.
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