ACM SIGMOD Anthology VLDB dblp.uni-trier.de

Using Probabilistic Information in Data Integration.

Daniela Florescu, Daphne Koller, Alon Y. Levy: Using Probabilistic Information in Data Integration. VLDB 1997: 216-225
@inproceedings{DBLP:conf/vldb/FlorescuKLP97,
  author    = {Daniela Florescu and
               Daphne Koller and
               Alon Y. Levy},
  editor    = {Matthias Jarke and
               Michael J. Carey and
               Klaus R. Dittrich and
               Frederick H. Lochovsky and
               Pericles Loucopoulos and
               Manfred A. Jeusfeld},
  title     = {Using Probabilistic Information in Data Integration},
  booktitle = {VLDB'97, Proceedings of 23rd International Conference on Very
               Large Data Bases, August 25-29, 1997, Athens, Greece},
  publisher = {Morgan Kaufmann},
  year      = {1997},
  isbn      = {1-55860-470-7},
  pages     = {216-225},
  ee        = {db/conf/vldb/FlorescuKLP97.html},
  crossref  = {DBLP:conf/vldb/97},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

The goal of a mediator system is to provide users a uniform interface to the multitude of information sources. To translate user queries, given in a mediated schema, to queries on the data sources, mediators rely on explicit mappings between the contents of the data sources and the meanings of the relations in the mediated schema.

Thus far, contents of data sources were described qualitatively. In this paper we describe the use of quantitative information in the from of probabilistic knowledge in mediator systems. We consider several kinds of probabilistic information: information about overlap between collections in the mediated schema, coverage of the information sources, and degrees of overlap between information sources. We address the problem of ordering accesses to multiple information sources, in order to maximize the likelihood of obtaining answers as early as possible. We describe a declarative formalism for specifying these kinds of probabilistic information, and we propose algorithms for ordering the information sources. Finally, we discuss a preliminary experimental evaluation of these algorithms on the domain of bibliographic sources available on the WWW.

Copyright © 1997 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

ACM SIGMOD Anthology

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Printed Edition

Matthias Jarke, Michael J. Carey, Klaus R. Dittrich, Frederick H. Lochovsky, Pericles Loucopoulos, Manfred A. Jeusfeld (Eds.): VLDB'97, Proceedings of 23rd International Conference on Very Large Data Bases, August 25-29, 1997, Athens, Greece. Morgan Kaufmann 1997, ISBN 1-55860-470-7
Contents BibTeX

References

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Sibel Adali, K. Selçuk Candan, Yannis Papakonstantinou, V. S. Subrahmanian: Query Caching and Optimization in Distributed Mediator Systems. SIGMOD Conference 1996: 137-148 BibTeX
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Daphne Koller, Alon Y. Levy, Avi Pfeffer: P-CLASSIC: A Tractable Probablistic Description Logic. AAAI/IAAI 1997: 390-397 BibTeX
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Referenced by

  1. Felix Naumann, Ulf Leser, Johann Christoph Freytag: Quality-driven Integration of Heterogenous Information Systems. VLDB 1999: 447-458
  2. Zachary G. Ives, Daniela Florescu, Marc Friedman, Alon Y. Levy, Daniel S. Weld: An Adaptive Query Execution System for Data Integration. SIGMOD Conference 1999: 299-310
  3. Daniela Florescu, Alon Y. Levy, Alberto O. Mendelzon: Database Techniques for the World-Wide Web: A Survey. SIGMOD Record 27(3): 59-74(1998)
  4. Luis Gravano, Yannis Papakonstantinou: Mediating and Metasearching on the Internet. IEEE Data Eng. Bull. 21(2): 28-36(1998)
  5. Soumen Chakrabarti, Byron Dom, Piotr Indyk: Enhanced Hypertext Categorization Using Hyperlinks. SIGMOD Conference 1998: 307-318
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