Interval-Based Modeling for Temporal Representation and Operations

Toshiyuki AMAGASA  Masayoshi ARITSUGI  Yoshinari KANAMORI  Yoshifumi MASUNAGA  

IEICE TRANSACTIONS on Information and Systems   Vol.E81-D   No.1   pp.47-55
Publication Date: 1998/01/25
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Databases
time-interval data model,  composite time intervals,  null time intervals,  temporal operations,  

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This paper proposes a time-interval data model in which all temporal representation and operations can be expressed with time intervals. The model expresses not only real time intervals, in which an event exists, but also null time intervals, in which an event is suspended. We model the history of a real-world event as a composite time interval, which is defined in this paper. Operations on the composite time intervals are also defined, and it is shown how these operations can be used to express temporal constraints with time intervals.