"The purpose of Notification IRP is to define an interface through which an IRPManager can subscribe to an IRPAgent for receiving notifications. The present document is the ""Requirements"" of Notification IRP. It defines@ for the purpose of subscribing to an IRPAgent for receiving notifications@ the basic requirements that shall be fulfilled on Itf-N. How IRPManager discovers the IRPAgent's address or reference (so that IRPManager can invoke an operation) is outside the scope of the present document."