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About Bipolar Division Operators

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Flexible Query Answering Systems (FQAS 2009)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 5822))

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Abstract

Introducing preferences inside user queries has gained more and more acceptance during the last decade. However, it turns out that the concept of bipolarity is of interest for expressing queries in the sense that some requirements are mandatory and play the role of constraints, whereas other are solely desirable. In this paper, we investigate how bipolarity may impact the division operator in the context of relational databases. Various forms of bipolar divisions can indeed be devised, each of them conveying a specific semantics.

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Author information

Authors and Affiliations

  1. IRISA/ENSSAT, 6, rue de Kerampont, BP 80518, 22305, Lannion Cedex, France

    Patrick Bosc & Olivier Pivert

Authors
  1. Patrick Bosc
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  2. Olivier Pivert
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Editor information

Editors and Affiliations

  1. Department of Computer Science, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark

    Troels Andreasen  & Henrik Bulskov  & 

  2. Iona College, Machine Intelligence Institute, 10801, New Rochelle, NY, USA

    Ronald R. Yager

  3. Computer Science Dept., Research group PLIS: Programming, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark

    Henning Christiansen

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

    Henrik Legind Larsen

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© 2009 Springer-Verlag Berlin Heidelberg

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Bosc, P., Pivert, O. (2009). About Bipolar Division Operators. In: Andreasen, T., Yager, R.R., Bulskov, H., Christiansen, H., Larsen, H.L. (eds) Flexible Query Answering Systems. FQAS 2009. Lecture Notes in Computer Science(), vol 5822. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04957-6_49

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  • DOI: https://doi.org/10.1007/978-3-642-04957-6_49

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-04956-9

  • Online ISBN: 978-3-642-04957-6

  • eBook Packages: Computer ScienceComputer Science (R0)

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