3.3.5.4.4 Message Transmission

The resource IP/STS MUST send a wsignoutcleanup1.0 request message to each WS resource using an explicit HTTP GET method because the protocol does not support chaining wsignoutcleanup1.0 messages using the HTTP 1.1 redirection facilities. How these messages are sent is implementation-specific and is not addressed in this protocol. The resource IP/STS MAY<82> walk the list of WS resources and issue the requests individually.