Computational Treatment of Temporal Notions – The CTTN-System

Author Hans-Jürgen Ohlbach

Thumbnail PDF


  • Filesize: 126 kB
  • 8 pages

Document Identifiers

Author Details

Hans-Jürgen Ohlbach

Cite AsGet BibTex

Hans-Jürgen Ohlbach. Computational Treatment of Temporal Notions – The CTTN-System. In Annotating, Extracting and Reasoning about Time and Events. Dagstuhl Seminar Proceedings, Volume 5151, pp. 1-8, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2005)


The CTTN-system is a computer program which provides advanced processing or temporal notions. The basic data structures of the CTTN-system are time points, crisp and fuzzy time intervals, labelled partitionings of the time line, durations, and calendar systems. The labelled partitionings are used to model periodic temporal notions, quite regular ones like years, months etc., partially regular ones like timetables, but also very irregular ones like, for example, dates of a conference series. These data structures can be used in the temporal specification language GeTS (GeoTemporal Specifications). GeTS is a functional specification and programming language with a number of built-in constructs for specifying customized temporal notions. CTTN is implemented as a Web server and as a C++ library. This paper gives a short overview over the current state of the system and its components.
  • Formalizing temporal notions


  • Access Statistics
  • Total Accesses (updated on a weekly basis)
    PDF Downloads
Questions / Remarks / Feedback

Feedback for Dagstuhl Publishing

Thanks for your feedback!

Feedback submitted

Could not send message

Please try again later or send an E-mail