D5.1 Catch-All Notification Broker Back-end: specification and release plan

The D5.1 Catch-All Notification Broker Back-end: specification and release plan (M5-ongoing, R-wiki) deliverable includes the results of the functional requirements, a specification of the software, and a release plan. The deliverable is on-going and will be updated at M15 (before first BETA release of the service), M23 (before second BETA release of the service), and M27 (before production release of the service).