A modal temporal logic for reasoning about change

  • Authors:
  • Eric Mays

  • Affiliations:
  • University of Pennsylvania, Philadelphia, PA

  • Venue:
  • ACL '83 Proceedings of the 21st annual meeting on Association for Computational Linguistics
  • Year:
  • 1983

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Abstract

We examine several behaviors for query systems that become possible with the ability to represent and reason about change in data bases: queries about possible futures, queries about alternative histories, and offers of monitors as responses to queries. A modal temporal logic is developed for this purpose. A completion axiom for history is given and modelling strategies are given by example.