NDLI: A unified approach for specifying timing constraints and composite events in active real-time database systems

Content Provider	IEEE Xplore Digital Library
Author	Guangtian Liu Mok, A.K. Konana, P.
Copyright Year	1998
Description	Author affiliation: Dept. of Comput. Sci., Texas Univ., Austin, TX, USA (Guangtian Liu)
Abstract	In active database systems, events are used in ECA rules to specify the time to check the conditions of the rules. Composite events can be constructed in an intuitive way by applying event operators, such as and, or, sequence, etc., to primitive events. Where timing is important, these event operators may introduce ambiguity if there is no formal semantics defining the occurrence of the composite events. The authors propose a formalism to specify a wider range of composite events with formal semantics in the logic RTL which is especially amenable for specifying timing constraints in real-time systems. The use of RTL to define the formal semantics also allows us to exploit compilation methods which can be used to translate the enabling conditions of ECA rules into timing constraints. Thus the detection of composite events can be handled by monitoring the corresponding timing constraints, a subject which has been explored in their previous work. A prototype implementation of this approach, a Java package for composite event specification, compilation and detection, is discussed in the paper.
Starting Page	199
Ending Page	208
File Size	298018
Page Count	10
File Format	PDF
ISBN	0818685697
DOI	10.1109/RTTAS.1998.683204
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Timing Database systems Real time systems Event detection Monitoring Information management Management information systems Logic Prototypes Java
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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