Skip to main content
Springer Nature Link
Log in

Fuzzy Closeness Relation as a Basis for Weakening Fuzzy Relational Queries

  • Conference paper
Flexible Query Answering Systems (FQAS 2004)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 3055))

Included in the following conference series:

Abstract

Query weakening is the modification of the conditions involved in a query in order to obtain a less restrictive variant and then a non empty set of answers. The aim of the paper is to propose an approach for dealing with this problem in the case of fuzzy queries against relational databases. The approach rests on a transformation mechanism that consists in applying a tolerance relation on fuzzy predicates contained in the query. A particular tolerance relation, which can be conveniently modeled in terms of a parameterized fuzzy closeness relation, is discussed. The modified fuzzy predicate is obtained by a simple arithmetic operation on fuzzy numbers. The transformation must guarantee that the weakened query is not semantically speaking too far from the initial one, and its limits are handled in a non-empirical rigorous way without requiring any additional information from the user.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Similar content being viewed by others

References

  1. Andreasen, T., Pivert, O.: On the weakening of fuzzy relational queries. In: 8th Int. Symp. on Meth. For intell. Syst., Charlotte, USA, pp. 144–151 (1994)

    Google Scholar 

  2. Andreasen, T., Pivert, O.: Improving answers to failing fuzzy relational queries. In: 6th Int. Fuzzy Syst. Assoc. World Congress, IFSA, São Paulo, Brazil, pp. 345–348 (1995)

    Google Scholar 

  3. Bosc, P., Pivert, O.: Some approaches for relational databases flexible querying. J. of Intell. Inf. Syst. 1, 323–354 (1992)

    Article  Google Scholar 

  4. Bouchon-Meunier, B., Yao, J.: Linguistic modifiers and imprecise categories. J. of Intell. Syst. 7, 25–36 (1992)

    Article  MATH  Google Scholar 

  5. Dubois, D., Prade, H.: Tolerant Fuzzy Pattern Matching: An Introduction. In: Bosc, P., Kacprzyk, J. (eds.) Fuzziness in Database Management Systems, Physica-Verlag, Heidelberg (1995)

    Google Scholar 

  6. Dubois, D., Prade, H.: Fundamentals of Fuzzy Sets. In: Dubois, D., Prade, H. (eds.) The Handbooks of Fuzzy Sets Series, vol. 3, Kluwer Academic Publishers, Dordrecht (2000)

    Google Scholar 

  7. HadjAli, A., Dubois, D., Prade, H.: Qualitative reasoning based on fuzzy relative orders of magnitude. IEEE Transactions on Fuzzy Systems 11(1), 9–23 (2003)

    Article  Google Scholar 

  8. Motro, A.: SEAVE: A mechanism for verifying user presuppositions in query systems. ACM Trans. on Off. Inf. Syst. 4(4), 312–330 (1986)

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. IRISA/ENSSAT, 6, rue de Kerampont, BP 447, 22305, Lannion Cedex, France

    Patrick Bosc, Allel HadjAli & Olivier Pivert

Authors
  1. Patrick Bosc
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Allel HadjAli
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Olivier Pivert
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

  1. Research group PLIS: Programming, Logic and Intelligent Systems, Department of Communication, Business and Information Technologies, Roskilde University, P.O. Box 260, DK-4000, Roskilde, Denmark

    Henning Christiansen

  2. LIRIS - UFR d’Informatique, Université Claude Bernard Lyon 1, 43, boulevard du 11 novembre 1918,, 69622, Villeurbanne, France

    Mohand-Saïd Hacid

  3. Department of Computer Science, Roskilde University, P.O. Box 260, DK-4000, Roskilde, Denmark

    Troels Andreasen

  4. Department of Computer Science and Engineering, Aalborg University Esbjerg, Niels Bohrs Vej 8Niels Bohrs Vej 8, 6700, Esbjerg, Denmark

    Henrik Legind Larsen

Rights and permissions

Reprints and permissions

Copyright information

© 2004 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Bosc, P., HadjAli, A., Pivert, O. (2004). Fuzzy Closeness Relation as a Basis for Weakening Fuzzy Relational Queries. In: Christiansen, H., Hacid, MS., Andreasen, T., Larsen, H.L. (eds) Flexible Query Answering Systems. FQAS 2004. Lecture Notes in Computer Science(), vol 3055. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-25957-2_5

Download citation

  • DOI: https://doi.org/10.1007/978-3-540-25957-2_5

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-22160-9

  • Online ISBN: 978-3-540-25957-2

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics