CERL: The Complex Event Recognition System

The Complex Event Recognition Architecture (CERA) provides five major innovations: (1) The ComplexEvent Description Language (CEDL): a declarative language for describing complex events: that is, eventsthat can occur across time, be sensed from multiple channels, and be composed of the conjunction, disjunctionor negation of other complex or simple events; (2) The Complex Event Recognition Language (CERL):a declarative pattern language for recognizing the occurrence of complex events; (3) The Complex EventRecognition Algorithm: an algorithm for recognizing instances of complex events using the Complex EventRecognition Language; (4) CERA software modules for integrating complex event recognition into existingsoftware systems; and (5) CERA software for the display, tracking and management of complex event occurrences.Significance: CERA allows systems built for robust planning, task execution, operations, and fault recoveryto have a rich, unified model of complex events which goes beyond simple telemetric data or propositionalforms. People managing complex systems, automated diagnostic reasoners and task planning and executionsoftware can use the CERA software to accurately and richly monitor critical events.