Simple Object Access Protocol

Much of the .NET Framework’s interoperability hinges on SOAP. Although developers can choose more efficient protocols, none of these protocols has SOAP’s flexibility. So what exactly is SOAP?

In broad terms, SOAP is an XML-based protocol that specifies a mechanism by which distributed applications can exchange both structured and typed information in a platform-independent and language-independent manner. In addition, SOAP specifies a mechanism for expressing remote procedure calls (RPC) as SOAP messages. SOAP specifies an envelope format for XML data wrapping, simple addressing, as well as data encoding and type encoding. This data-encoding scheme is especially interesting because it standardizes type descriptions ...

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