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Composite Event

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Encyclopedia of Database Systems

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Definition

A composite event is a set of events matching an event specification.

Key Points

Pioneering work on composite events was done in the HiPAC project [3] and the ideas were extended and refined in most proposals for active object-oriented databases during the early 1990s.

A composite event is composed according to an event specification (in an event algebra), where the composition is performed using a set of event operators such as disjunction, conjunction and sequence. More advanced event operators have been suggested in literature, e.g., [2,4,5].

The initiator of a composite event is the event initiating the composite event occurrence and the terminator is the event terminating the composite event occurrence.

Events contributing to composite events may carry parameters (e.g., temporal) in which the event is said to occur. Events contributing to composite events are also referred to as constituent events.

Composite events need to be composed according to some event context...

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Recommended Reading

  1. Chakravarthy S., Krishnaprasad V., Anwar E., and Kim S.K. Composite events for active databases: semantics contexts and detection. In Proc. 20th Int. Conf. on Very Large Data Bases, 1994, pp. 606–617.

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  2. Chakravarthy S. and Mishra D. Snoop: an expressive event specification language for active databases. Data Knowl. Eng., 14(1):1–26, 1994.

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  3. Dayal U., Blaustein B., Buchmann A., and Chakravarthyand S. et al. HiPAC: A Research Project in Active, Time-Constrained Database Management. Tech. Rep. CCA-88-02, Xerox Advanced Information Technology, Cambridge, 1988.

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  4. Gatziu S. Events in an Active Object-Oriented Database System. Ph.D. thesis, University of Zurich, Switzerland, 1994.

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  5. Gehani N., Jagadish H.V., and Smueli O. Event Specification in an Active Object-Oriented Database. In Proc. ACM SIGMOD Int. Conf. on Management of Data, 1992, pp. 81–90.

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Author information

Authors and Affiliations

  1. University of Skövde, Skövde, Sweden

    AnnMarie Ericsson, Mikael Berndtsson & Jonas Mellin

Authors
  1. AnnMarie Ericsson
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  2. Mikael Berndtsson
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  3. Jonas Mellin
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Editor information

Editors and Affiliations

  1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

    LING LIU (Professor) (Professor)

  2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

    M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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© 2009 Springer Science+Business Media, LLC

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Ericsson, A., Berndtsson, M., Mellin, J. (2009). Composite Event. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_514

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