Incomplete Information in Relational Temporal Databases.

Shashi K. Gadia, Sunil S. Nair, Yiu-Cheong Poon: Incomplete Information in Relational Temporal Databases. VLDB 1992: 395-406

@inproceedings{DBLP:conf/vldb/GadiaNP92,
  author    = {Shashi K. Gadia and
               Sunil S. Nair and
               Yiu-Cheong Poon},
  editor    = {Li-Yan Yuan},
  title     = {Incomplete Information in Relational Temporal Databases},
  booktitle = {18th International Conference on Very Large Data Bases, August
               23-27, 1992, Vancouver, Canada, Proceedings},
  publisher = {Morgan Kaufmann},
  year      = {1992},
  isbn      = {1-55860-151-1},
  pages     = {395-406},
  ee        = {db/conf/vldb/GadiaNP92.html},
  crossref  = {DBLP:conf/vldb/92},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

For the conventional relational model there has been considerable research in the area of incomplete information. On the other hand, research in temporal databases has concentrated on models inwhich complete historical information is needed. However, the likelihood of missing information in temporal databases is greaterbecause of the vast amount of information. Hence, a mechanism must be provided to store and query incomplete temporal information. In this paper we present a model for incomplete information in temporal databases. The model generalizes our previous model for complete temporal information. It is shown that our relational operators produce results that are reliable. We also show, with some exceptions, that if the definitions of the operators were strengthened to give more information, we may obtain results that are not reliable.

Copyright © 1992 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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Contents

References

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