Time Interval Period

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A Time Interval Period is a contiguous subsequence (an interval) of a temporal dimension with a start time and an end time.



  • (Wikipedia, 2017) ⇒ https://en.wikipedia.org/wiki/Time#Time-like_concepts:_terminology Retrieved:2017-10-12.
    • The term "time" is generally used for many close but different concepts, including:
      • instant [1] as an object — one point on the time axes. Being an object, it has no value;
      • time interval [2] as an object — part of the time axes limited by two instants. Being an object, it has no value;
      • date [3] as a quantity characterising an instant. As a quantity, it has a value which may be expressed in a variety of ways, for example "2014-04-26T09:42:36,75" in ISO standard format, or more colloquially such as "today, 9:42 a.m.";
      • duration [4] as a quantity characterizing a time interval. [5] As a quantity, it has a value, such as a number of minutes, or may be described in terms of the quantities (such as times and dates) of its beginning and end.



  • http://www.isi.edu/~hobbs/bgt-time.text
    • There are two kinds of temporal entities -- instants and intervals.
      • (1) (forall (t) (if (instant t) (temporalEntity t)))
      • (2) (forall (t) (if (interval t) (temporalEntity t)))
    • No assumptions are made about whether intervals _consist_ of instants. Rather one can specify relations between the two, such as that an instant begins or ends or is inside an interval.


  • (Hobbs & Pan, 2004 => {[Jerry R. Hobbs]], and Feng Pan. (2004). “An Ontology of Time for the Semantic Web.” In: ACM Transactions on Asian Language Information Processing, Vol. 3, No. 1.


  • (Allen & Ferguson, 1997) ⇒ James F Allen, and George Ferguson. (1997). “Actions and Events in Interval Temporal Logic.” In: O. Stock (ed.). “Spatial and Temporal Reasoning, Kluwer Academic Publishers.


  • (Allen & Kautz, 1985) ⇒ James F Allen, and Henry A. Kautz. (1985). “A Model of Naive Temporal Reasoning.” In: "Formal Theories of the Commonsense World." ed. by Jerry R. Hobbs and Robert C. Moore, Ablex Publishing Corp.

  1. IEC 60050-113:2011, item 113-01-08
  2. IEC 60050-113:2011, item 113-01-010; ISO 80000-3:2006, item 3-7
  3. IEC 60050-113:2011, item 113-01-012: "mark attributed to an instant by means of a specified time scale
  4. IEC 60050-113:2011, item 113-01-013: "range of a time interval (113-01-10)"
  5. ISO 80000-3:2006, item 3-7