ACM SIGMOD Anthology VLDB dblp.uni-trier.de

A Temporal Knowledge Representation Model OSAM*/T and Its Query Language OQL/T.

Stanley Y. W. Su, Hsin-Hsing M. Chen: A Temporal Knowledge Representation Model OSAM*/T and Its Query Language OQL/T. VLDB 1991: 431-442
@inproceedings{DBLP:conf/vldb/SuC91,
  author    = {Stanley Y. W. Su and
               Hsin-Hsing M. Chen},
  editor    = {Guy M. Lohman and
               Am\'{\i}lcar Sernadas and
               Rafael Camps},
  title     = {A Temporal Knowledge Representation Model OSAM*/T and Its Query
               Language OQL/T},
  booktitle = {17th International Conference on Very Large Data Bases, September
               3-6, 1991, Barcelona, Catalonia, Spain, Proceedings},
  publisher = {Morgan Kaufmann},
  year      = {1991},
  isbn      = {1-55860-150-3},
  pages     = {431-442},
  ee        = {db/conf/vldb/SuC91.html},
  crossref  = {DBLP:conf/vldb/91},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

The importance of temporal database management and temporal reasoning has long been recognized by the database and AI communities. Many techniques for modeling and managing temporal databases have been introduced. Most of the existing research on temporal databases have been based on the relational data model which has limited capabilities in modeling complex objects, constraints, and behavioral properties. In this paper, we present an object-oriented knowledge-based approach to model and process temporal information. A temporal knowledge representation model OSAM*/T is described. It is an extension of the object-oriented semantic association model OSAM* to capture the concepts of time and history. Object time-stamping is used to record the evolutions of objects, and knowledgerules instead of extra time notions are used to capture special temporal requirements. The temporal model is also featured by its separation of historical data and current data and its simple and maintainable representation of complex objects. In addition to the temporal data model, this paper also introduces a temporal query language OQL/T which is an extension of the object-oriented query languageOQL for processing temporal information. Several temporal functions, interval comparison operators, and set operators are described.

Copyright © 1991 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.


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Guy M. Lohman, Amílcar Sernadas, Rafael Camps (Eds.): 17th International Conference on Very Large Data Bases, September 3-6, 1991, Barcelona, Catalonia, Spain, Proceedings. Morgan Kaufmann 1991, ISBN 1-55860-150-3
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