Conflict Resolution of Rules Assigning Values to Virtual Attributes.

Yannis E. Ioannidis, Timos K. Sellis: Conflict Resolution of Rules Assigning Values to Virtual Attributes. SIGMOD Conference 1989: 205-214

@inproceedings{DBLP:conf/sigmod/IoannidisS89,
  author    = {Yannis E. Ioannidis and
               Timos K. Sellis},
  editor    = {James Clifford and
               Bruce G. Lindsay and
               David Maier},
  title     = {Conflict Resolution of Rules Assigning Values to Virtual Attributes},
  booktitle = {Proceedings of the 1989 ACM SIGMOD International Conference on
               Management of Data, Portland, Oregon, May 31 - June 2, 1989},
  publisher = {ACM Press},
  year      = {1989},
  pages     = {205-214},
  ee        = {http://doi.acm.org/10.1145/67544.66945},
  crossref  = {DBLP:conf/sigmod/89},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

In the majority of research work done on logic programming and deductive databases, it is assumed that the set of rules defined by the user is consistent, i.e., that no contradictory facts can be inferred by the rules. In this paper, we address the problem of resolving conflicts of rules that assign values to virtual attributes. We devise a general framework for the study of the problem, and we propose an approach that subsumes all previously suggested solutions. Moreover, it suggests several additional solutions, which very often capture the semantics of the data more accurately than the known approaches. Finally, we address the issue of how to index rules so that conflicts are resolved efficiently, i.e., only one of the applicable rules is processed at query time.

Copyright © 1989 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

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