Rulebased reasoning in event processing springerlink. A rulebased language for complex event processing and. Etalis language for events, and event processing sparql. We present the etalis language for events ele, which is a declarative rulebased language for ep. A rulebased system for complex event processing darko anicic paul. The task of complex event processing and stream reasoning in etalis is depicted in figure 1, and it can be described as follows. Event processing systems with a logicbased representation have attracted considerable attention as among others reasons they feature formal semantics and offer reasoning service. It supports the above mentioned features, and goes beyond the state of the art by providing.
Our language for cep, etalis, is developed to close the gap between eventdriven and logicbased systems. We present a rulebased language with a clear syntax and a declarative formal semantics. Complex event processing cep systems aim at processing large flows. Etalis has various applicabilities in capturing changes in semantic networks, broadcasting notifications to interested parties, and creating further changes based on processing of the temporal, static, or slowly evolving knowledge. Request pdf on researchgate a rulebased language for complex event processing and. In this chapter, we present etalis language for events. The book explores how stream reasoning capabilities together with ep capabilities of ele have the potential to provide powerful real time intelligence. Realtime complex event recognition and reasoning a. It supports the above mentioned features, and goes beyond the state of the art by providing stream reasoning capabilities. The language is also general enough to support extensions with respect to other operators and features required in event processing e.
Semantic complex event processing for social media monitoring a. Our language for cep, etalis, is developed to close the gap between event driven. Rulebased reasoning in event processing request pdf. Our language for cep, etalis, is developed to close the gap between eventdriven. Complex event recognition cer refers to the detection of events in big data streams. An approach for more efficient energy consumption based on realtime situationalanicic et al. Etalis is implemented in prolog and uses a prolog inference engine for event processing. It will serve as a valuable resource for students, faculty and researchers as well as industry practitioners responsible for new systems development. In this work, we identify requirements for modern ep systems. It is an expressive language for specifying and combining complex events.
The execution model of the language is based on a compilation strategy into prolog. Part of the studies in computational intelligence book series sci, volume 347. Realtime complex event recognition and reasoning a logic programming approach 3 deductive reasoning over event streams and the domain knowledge. The later approach has resulted in a new rulebased language etalis 14 and. Stream reasoning and complex event processing in etalis. Complex event recognition languages proceedings of the 11th. Stream reasoning and complex event processing diva. The language is powerful enough to effectively express and evaluate all thirteen allens temporal relationships 3. Complex event processing cep is concerned with timely detection of complex events within multiple streams of atomic occurrences, and has useful applications in areas including financial services, mobile and sensor devices, click stream analysis and so forth. Efficient near realtime processing of large numbers of events.
Ele, which are then executed on the etalis engine 6, 7. The etalis language for events ele is a declarative rulebased language for ep. Etalis 2 is a rulebased stream reasoning and complex event processing cep system. Reasoning in eventbased distributed systems sven helmer. Event processing and stream reasoning with etalis darko anicic fzi research center for information technology, germany inquest 2012, oxford, united kingdom. Reasoning in event based distributed systems, volume 347 of studies in computational intelligence, springer berlin heidelberg, 10.
This book presents the etalis language for events ele, which is a declarative rulebased language for processing events in the context of background domain knowledge. Etalis the etalis engine is an open source system for complex event pro cessing that. Event processing and stream reasoning with etalis ik m. However logicbased approaches are not optimized for runtime event recognition as they are mainly querydriven systems. Within some dynamic setting, events from multiple event sources take place see events in figure 1. For this language we provide both a syntax as well as a clear declarative formal semantics. Etalis implements two languages for specification of event patterns.
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