A Reusable Time Ontology

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Citation: Qing Zhou and Richard Fikes. (2000) A Reusable Time Ontology. In KSL-00-01, February,2000.

Publication techreport ( Edit )
type Technical Report
bibtype techreport
Bibtex basics
author Qing Zhou and Richard Fikes
title A Reusable Time Ontology
number KSL-00-01
institution Knowledge Systems, AI Laboratory
year 2000
month February
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abstract In this paper we present a reusable time ontology for large-scale knowledge system applications, that is intuitive, expressive, formally defined, logically consistent, and ready-to-use. Our underlying time theory treats both time points and time intervals as primitive elements on a time line, and the ontology contains a class hierarchy, relations, axioms and instances built on those primitives. The main contributions of this work are the following three. (1) The ontology makes a distinction between closed and open intervals, as opposed to many previous time ontologies. However we provide flexibility of usage by providing two sets of relations on intervals: one that assumes that distinction and one that does not. (2) Time granularity is implemented in the ontology to facilitate representing time in varying granularity in a layered model and switching from or relating one granularity to a coarser/finer one. (3) The ontology includes classes for calendar months, calendar days and weekdays. The instances of these classes have many attributes associated with them that are useful in knowledge domains concerning human activities. We also present examples of usage of the ontology and comparisons with previous time ontologies.

KSL Technical Report ID: KSL-00-01
Facts about A Reusable Time OntologyRDF feed
Abstract In this paper we present a reusable time o … In this paper we present a reusable time ontology for large-scale knowledge system applications, that is intuitive, expressive, formally defined, logically consistent, and ready-to-use. Our underlying time theory treats both time points and time intervals as primitive elements on a time line, and the ontology contains a class hierarchy, relations, axioms and instances built on those primitives. The main contributions of this work are the following three. (1) The ontology makes a distinction between closed and open intervals, as opposed to many previous time ontologies. However we provide flexibility of usage by providing two sets of relations on intervals: one that assumes that distinction and one that does not. (2) Time granularity is implemented in the ontology to facilitate representing time in varying granularity in a layered model and switching from or relating one granularity to a coarser/finer one. (3) The ontology includes classes for calendar months, calendar days and weekdays. The instances of these classes have many attributes associated with them that are useful in knowledge domains concerning human activities. We also present examples of usage of the ontology and comparisons with previous time ontologies. comparisons with previous time ontologies.
Author Qing Zhou and Richard Fikes  +
Bibtype techreport  +
Has author Qing Zhou and Richard Fikes  +
Has identifier KSL-00-01  +
Has publishing details February,2000  +
Has title A Reusable Time Ontology  +
Has where published KSL-00-01  +
Has year 2000  +
Institution Knowledge Systems, AI Laboratory  +
Ksl tr id KSL-00-01  +
Month February  +
Number KSL-00-01  +
Process note NO  +
Title A Reusable Time Ontology  +
Year 2000  +
Retrieved from "http://tw.rpi.edu/wiki/A_Reusable_Time_Ontology"
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