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Encyclopedia of Database Systems pp 3467–3469Cite as

Sequenced Semantics

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Definition

Sequenced semantics make it possible to generalize a query language statement on a nontemporal database to a temporal query on a corresponding temporal, interval time-stamped database by applying minor syntactic modifications to the statement that are independent of the particular statement. The semantics of such a generalized statement is consistent with considering the temporal database as being composed of a sequence of nontemporal database states. Sequenced semantics takes into account the interval timestamps of the argument tuples when forming the interval timestamps associated with result tuples, as well as permits the use of additional timestamp-related predicates in statements.

Key Points

A question that has intrigued temporal database researchers for years is how to systematically generalize nontemporal query language statements, i.e., queries on nontemporal databases, to apply to corresponding temporal databases. A prominent approach is to view a temporal database...

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Recommended Reading

  1. Böhlen MH, Busatto R, Jensen CS. Point- versus interval-based temporal data models. In: Proceedings of the 14th International Conference on Data Engineering; 1998. p. 192–200.

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  2. Böhlen MH, Jensen CS, Snodgrass RT. Temporal statement modifiers. ACM Trans Database Syst. 2000;25(4):48.

    Article  MATH  Google Scholar 

  3. Snodgrass RT. Developing time-oriented database applications in SQL. San Francisco: Morgan Kaufmann; 1999.

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Author information

Authors and Affiliations

  1. Free University of Bozen-Bolzano, Bozen-Bolzano, Italy

    Michael H. Böhlen

  2. University of Zurich, Zürich, Switzerland

    Michael H. Böhlen

  3. Department of Computer Science, Aalborg University, Aalborg, Denmark

    Christian S. Jensen

Authors
  1. Michael H. Böhlen
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  2. Christian S. Jensen
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Corresponding authors

Correspondence to Michael H. Böhlen or Christian S. Jensen .

Editor information

Editors and Affiliations

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

    Ling Liu

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

    M. Tamer Özsu

Section Editor information

  1. University of Arizona, Tucson, AZ, USA

    Richard T. Snodgrass

  2. Aalborg University, Aalborg Øst, Denmark

    Christian S. Jensen

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Böhlen, M.H., Jensen, C.S. (2018). Sequenced Semantics. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_1053

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