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  • We present logical foundations for an extension of Codd's relational model of data which aims at utilizing various aspects of similarity. This paper argues that solid foundations for similarity-based databases can be developed in a conceptually sound way. We outline the foundations and propose two query systems for similarity-based databases: a domain relational calculus (DRC) and a relational algebra (RA). We compare the expressive power of DRC and RA in our model and prove relational completeness of RA over DRC. A major implication of the paper is that similarity-based data querying can be made an integral part of an extended, similarity-based, relational model of data which is based on first-order predicate logics using residuated structures of truth values in much the same way as the querying in the Codd's model is based on the classic first-order predicate logic.
  • We present logical foundations for an extension of Codd's relational model of data which aims at utilizing various aspects of similarity. This paper argues that solid foundations for similarity-based databases can be developed in a conceptually sound way. We outline the foundations and propose two query systems for similarity-based databases: a domain relational calculus (DRC) and a relational algebra (RA). We compare the expressive power of DRC and RA in our model and prove relational completeness of RA over DRC. A major implication of the paper is that similarity-based data querying can be made an integral part of an extended, similarity-based, relational model of data which is based on first-order predicate logics using residuated structures of truth values in much the same way as the querying in the Codd's model is based on the classic first-order predicate logic. (en)
Title
  • Query systems in similarity-based databases: logical foundations, expressive power, and completeness.
  • Query systems in similarity-based databases: logical foundations, expressive power, and completeness. (en)
skos:prefLabel
  • Query systems in similarity-based databases: logical foundations, expressive power, and completeness.
  • Query systems in similarity-based databases: logical foundations, expressive power, and completeness. (en)
skos:notation
  • RIV/61989592:15310/10:10216467!RIV11-MSM-15310___
http://linked.open...avai/riv/aktivita
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  • Z(MSM6198959214)
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  • 283679
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  • RIV/61989592:15310/10:10216467
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  • query languages, similarity-based databases, fuzzy logic (en)
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  • [0A091C1B3194]
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  • Sierre, Švýcarsko
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  • New York
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  • Proceedings of the 25th Symposium On Applied Computing
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  • Bělohlávek, Radim
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number of pages
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  • ACM Press
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  • 978-1-60558-638-0
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  • 15310
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