INTERVAL-BASED MODELING FOR TEMPORAL REPRESENTATION AND OPERATIONS

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