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Encyclopedia of Database Systems pp 1063Cite as

Event Stream

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Synonyms

Event pipe; Event network edge

Definition

An Event Stream is a collection of ordered events [4].

Key Points

An event stream is a collection of events, with one or more order relations. The naïve order relation is according to the time that the event arrives to the processing system, but this may not reflect the event order in reality [2], which may define an additional order relation. An event stream may be homogenous (all events have the same structure and type) or heterogeneous (include events that have different types). Homogenous streams are also known as Data-Type Streams. For practical usages, typically data-type streams are used. An edge in the event processing network, known as event pipe typically is a superset of event stream [5].

Sometimes event stream is used as a synonym to event pipe. This term has some relation to “data stream,” but it is not identical [1], and does not necessarily correspond to SQL implementation. A typical case of event stream is a...

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Recommended Reading

  1. Albers K., Bodmann F., Slomka F. Hierarchical Event Streams and Event Dependency Graphs: A New Computational Model for Embedded Real-Time Systems. In Proc. 18th Euromicro Conf. Real-Time Systems, 2006, pp. 97–106.

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  2. Barga R.S., Goldstein J., Ali M.H., Hong M. Consistent Streaming Through Time: A Vision for Event Stream Processing. In Proc. 3rd Biennial Conf. on Innovative Data Systems Research, 2007, pp. 363–374.

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  3. Li M., Liu M., Rundensteiner E.A., and Mani M. Event Stream Processing with Out-of-Order Data Arrival. In Proc. 1st Int. Workshop on Distributed Event Processing, Systems and Applications, 2007.

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  4. Luckham D., Schulte D. (eds.). EPTS Event Processing Glossary version 1.1. http://complexevents.com/?p=409.

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  5. Sharon G., Etzion O. Event Processing network: Model and implementation, IBM System Journal, 47(2):321–334, 2008.

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Author information

Authors and Affiliations

  1. IBM Research Labs-Haifa, Haifa, Israel

    Opher Etzion

Authors
  1. Opher Etzion
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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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Etzion, O. (2009). Event Stream. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_590

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