Maintaining Knowledge about Temporal Intervals.
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| Title: | Maintaining Knowledge about Temporal Intervals. |
|---|---|
| Authors: | Allen, James F.1, Waltz, David |
| Source: | Communications of the ACM. Nov83, Vol. 26 Issue 11, p832-843. 12p. 10 Diagrams. |
| Subjects: | Engineering databases, Information storage & retrieval systems, Interval analysis, Numerical analysis, ENGINE (Information retrieval system), INSPEC (Information retrieval system), Project SHARP |
| Abstract: | An interval-based temporal logic is introduced together with a computationally effective reasoning algorithm based on constraint propagation This system is notable in offering a delicate balance between expressive power and the efficiency of its deductive engine. A notion of reference intervals is introduced which captures the temporal hierarchy implicit in many domains, and which can be used to precisely control the amount of deduction performed automatically by the system. Examples we provided for a database containing historical data, a database used fur modeling processes and process interaction, and a database for an interactive system where the present moment is continually being updated. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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