Systems and methods that facilitate messaging capabilities within a unified plant model (UPM) via employing a plurality of message engines that collaborate in such system. Linkage can be provided among the plurality of message engines, to provide real time interaction among the message engines/services, wherein each message engine normalizes messaging of various messaging protocols and formats. Also various systems of the UPM can map thereto—and provide a consistent interface where events are sent/received consistently across the system.