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Modelling the Semantics of Calendar Expressions as Extended Regular Expressions

  • Jyrki Niemi
  • Lauri Carlson
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4002)

Abstract

This paper proposes modelling the semantics of natural-language calendar expressions as extended regular expressions (XREs). The approach covers expressions ranging from plain dates and times of the day to more complex ones, such as thesecond Tuesdayfollowing Easter. Expressions denoting disconnected periods of time are also covered. The paper presents an underlying string-based temporal model, sample calendar expressions with their XRE representations, and possible applications in temporal reasoning and natural-language generation.

Keywords

Regular Expression Temporal Expression Basic Period Regular Language Calendar Period 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Jyrki Niemi
    • 1
  • Lauri Carlson
    • 1
  1. 1.Department of General LinguisticsUniversity of HelsinkiFinland

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