An interval-based representation of temporal knowledge
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TL;DR
This paper describes a method for maintaining the relationships between temporal intervals in a hierarchical manner using constraint propagation techniques, and allows one to represent intervals that may extend indefinitely into the past/future.
Abstract
This paper describes a method for maintaining the relationships between temporal intervals in a hierarchical manner using constraint propagation techniques. The representation includes a notion of the present moment (i.e., "now") , and allows one to represent intervals that may extend indefinitely into the past/future.