a Service that implements the distribution of Notification messages to satisfy Subscriptions.

NOTE The Notification Messages themselves are generated by a Publisher (and may be routed to the Notification Producer via a Notification Broker). A Notification Producer maintains a list of Subscription resources and uses the Topic Filters of the individual Subscriptions to match the Notification Messages with the Subscribers’ interests. If it identifies a match, it issues a notification to the Notification Consumer associated with the Subscription.