3.2.1.1.2 WSMV CommandId to Pipeline Table
The server MUST maintain a global table that maps a WSMV command to data associated with a pipeline (see section 3.2.1.3).
The key used in the table is the value of the CommandId element sent back in the wxf:CommandResponse message (see [MS-WSMV] section 2.2.4.8).