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Encyclopedia of Database Systems pp 1–2Cite as

Active Database Knowledge Model

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Definition

The knowledge model of an active database describes what can be said about the ECA rules, that is, what types of events are supported, what types of conditions are supported, and what types of actions are supported?

Key Points

The knowledge model describes what types of events, conditions, and actions are supported in an active database. Another way to look at the knowledge model is to imagine what types of features are available in an ECA rule definition language.

A framework of dimensions for the knowledge model is presented in [3]. Briefly, each part of an ECA rule is associated with dimensions that describe supported features. Thus, an event can be described as either a primitive event or a composite event, how it was generated (source), whether the event is generated for all instances in a given set or only for a subset (event granularity),and what types (if event is a composite event) of operators and event consumption modes are used in the detection of the composite...

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Recommended Reading

  1. Dayal U, Blaustein B, Buchmann A. et al. S.C. HiPAC: a research project in active, time-constrained database management. Technical report CCA-88-02, Xerox Advanced Information Technology, Cambridge; 1988a.

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  2. Dayal U, Buchmann A, McCarthy D. Rules are objects too: a knowledge model for an active, object-oriented database system. In: Proceedings of 2nd international workshop on object-oriented database systems; 1988b. p. 129–43.

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  3. Paton NW, Diaz O. Active database systems. ACM Comput Surv. 1999;31(1):63–103.

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Authors and Affiliations

  1. University of Skövde, Skövde, Sweden

    Mikael Berndtsson & Jonas Mellin

Authors
  1. Mikael Berndtsson
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  2. Jonas Mellin
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Corresponding author

Correspondence to Mikael Berndtsson .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, Georgia, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, Ontario, Canada

    M. Tamer Özsu

Section Editor information

  1. Cheriton School of Computer Science, University of Waterloo, N2L 3G1, Waterloo, ON, Canada

    M. Tamer Özsu

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© 2017 Springer Science+Business Media LLC

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Berndtsson, M., Mellin, J. (2017). Active Database Knowledge Model. In: Liu, L., Özsu, M. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4899-7993-3_508-2

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  • DOI: https://doi.org/10.1007/978-1-4899-7993-3_508-2

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4899-7993-3

  • Online ISBN: 978-1-4899-7993-3

  • eBook Packages: Springer Reference Computer SciencesReference Module Computer Science and Engineering

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