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Retrieval-By-Unification Operation on a Relational Knowledge Base.

Yukihiro Morita, Haruo Yokota, Kenji Nishida, Hidenori Itoh: Retrieval-By-Unification Operation on a Relational Knowledge Base. VLDB 1986: 52-59
@inproceedings{DBLP:conf/vldb/MoritaYNI86,
  author    = {Yukihiro Morita and
               Haruo Yokota and
               Kenji Nishida and
               Hidenori Itoh},
  editor    = {Wesley W. Chu and
               Georges Gardarin and
               Setsuo Ohsuga and
               Yahiko Kambayashi},
  title     = {Retrieval-By-Unification Operation on a Relational Knowledge
               Base},
  booktitle = {VLDB'86 Twelfth International Conference on Very Large Data Bases,
               August 25-28, 1986, Kyoto, Japan, Proceedings},
  publisher = {Morgan Kaufmann},
  year      = {1986},
  isbn      = {0-934613-18-4},
  pages     = {52-59},
  ee        = {db/conf/vldb/MoritaYNI86.html},
  crossref  = {DBLP:conf/vldb/86},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

This paper describes a method for retrieval-by-unification (RBU) operations, especially unification-join, on a relational knowledge base. The relational knowledge base is a conceptual model for a knowledge base. In this model knowledge is represented by term relations. Terms in the term relations are retrieved with operation called RBUs (i.e., unification-join and unification-restriction). To perform unification-join in the simplest manner, all possible pairs of tuples in term relations should be checked to see if each pair of terms in the tuples is unifiable or not. This would result in an extremely heavy processing load. We propose a method which involves ordering terms and, as result, omitting some pairs from this processing. The paper also describes a method for implementing the unificaiion engine (UE), that is, hardware dedicated to the RBU operations.

Copyright © 1986 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.


Online Paper

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Printed Edition

Wesley W. Chu, Georges Gardarin, Setsuo Ohsuga, Yahiko Kambayashi (Eds.): VLDB'86 Twelfth International Conference on Very Large Data Bases, August 25-28, 1986, Kyoto, Japan, Proceedings. Morgan Kaufmann 1986, ISBN 0-934613-18-4
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