• DocumentCode
    3395457
  • Title

    A first approach to possibilistic queries addressed to possibilistic databases

  • Author

    Bosc, Patrick ; Duval, Laurence ; Pivert, Olivier

  • Author_Institution
    IRISA/ENSSAT, Lannion, France
  • Volume
    4
  • fYear
    2001
  • fDate
    25-28 July 2001
  • Firstpage
    2452
  • Abstract
    It is now recognized that querying databases containing imprecise information raises several problems, including that of complexity. The authors consider a new kind of query, called possibilistic queries, of the form "to what extent is it possible that a given tuple t belongs to the answer of Q (a regular relational query)". The paper is a first attempt to show that a reasonable complexity can be expected for a specified subset of possibilistic queries
  • Keywords
    computational complexity; fuzzy set theory; possibility theory; query processing; relational algebra; relational databases; uncertainty handling; complexity; database querying; imprecise information; possibilistic databases; possibilistic queries; relational query; tuple; Database systems; Fuzzy sets; Null value; Possibility theory; Proposals; Relational databases; Uncertainty;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    IFSA World Congress and 20th NAFIPS International Conference, 2001. Joint 9th
  • Conference_Location
    Vancouver, BC
  • Print_ISBN
    0-7803-7078-3
  • Type

    conf

  • DOI
    10.1109/NAFIPS.2001.944457
  • Filename
    944457