2.1 Transport
The SOAP over WebSocket Protocol Binding requires the WebSocket transport protocol (as specified in [RFC6455])<1>.
A service endpoint that uses
the SOAP over WebSocket Protocol Binding with SOAP 1.2 [SOAP1.2-1/2007]
MUST set the value of the transport attribute of the wsoap12:binding
element [WSDLSOAP] to
http://schemas.microsoft.com/soap/websocket.