7.3.3 SOAP
SOAP is a lightweight protocol intended for exchanging structured information in a decentralized, distributed environment. SOAP uses XML technologies to define an extensible messaging framework, which provides a message construct that can be exchanged over a variety of underlying protocols. The framework is designed to be independent of any programming model and other implementation-specific semantics.
Windows makes extensive use of SOAP in numerous protocols such as the .NET Binary Format: SOAP Extension, specified in [MC-NBFSE] and SOAP Over WebSocket Protocol Binding, specified in [MS-SWSB].