Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Bitemporal Interval

  • Christian S. Jensen
  • Richard T. Snodgrass
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1424

Definition

Facts in a bitemporal database may be timestamped by time values that are products of time intervals drawn from two orthogonal time domains that model valid time and transaction time, respectively. A bitemporal interval then is given by an interval from the valid-time domain and an interval from the transaction-time domain, and denotes a rectangle in the two-dimensional space spanned by valid and transaction time.

When associated with a fact, a bitemporal interval then identifies an interval (valid time) during which that fact held (or holds or will hold) true in reality, as well as identifies an interval (transaction time) when that belief (that the fact was true during the specified valid-time interval) was held, i.e., was part of the current database state.

Key Points

In this definition, a time interval denotes a convex subset of the time domain. Assuming a discrete time domain, a bitemporal interval can be represented with a non-empty set of bitemporal chronons or...

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Recommended Reading

  1. 1.
    Bettini C, Dyreson CE, Evans WS, Snodgrass RT, Wang XS. A glossary of time granularity concepts. In: Etzion O, Jajodia S, Sripada S, editors. Temporal databases: research and practice. LNCS, vol. 1399. Berlin: Springer; 1998. p. 406–13.CrossRefGoogle Scholar
  2. 2.
    Jensen CS, Dyreson CE, editors. A consensus glossary of temporal database concepts-February 1998 version. In: Etzion O, Jajodia S, Sripada S, editors. Temporal databases: research and practice. LNCS, vol. 1399. Berlin: Springer; 1998. p. 367–405.Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Computer ScienceAalborg UniversityAalborgDenmark
  2. 2.Department of Computer ScienceUniversity of ArizonaTucsonUSA
  3. 3.Dataware VenturesTucsonUSA

Section editors and affiliations

  • Richard T. Snodgrass
    • 1
  • Christian S. Jensen
    • 2
  1. 1.University of ArizonaTucsonUSA
  2. 2.Aalborg UniversityAalborg ØstDenmark