2.2.1.7.2 com.microsoft.wm.predstrm

This token specifies support for predictive stream selection. This is a technique in which the server selects a set of streams from the next entry in a server-side playlist on the client's behalf and starts streaming those streams. When predictive stream selection is not used, the server will not start streaming the next entry in the server-side playlist until the client has sent a SelectStream request (section 2.2.2.8) or PlayNextEntry request (section 2.2.2.7), as appropriate (it depends on whether pipelined mode or non-pipelined mode is used).