17. The system as recited in claim 16 , wherein the communication channel management subsystem receives business level messages from the business process management subsystem and responsively broadcasts one or more system level messages onto the communication channel in the generic format, whereby subscribing subsystems can receive the one or more system level messages related to subjects to which the subsystems subscribe.
16. The system as recited in claim 14 wherein the communication channel management subsystem maintains subscriptions associated with the business subsystems.