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              <p>Dans le contexte de l'interrogation flexible de bases  de données, cet article présente une nouvelle stratégie de requête  par l'exemple floue, appelée DCQ (Disjunctive Concept Querying), qui  permet de traiter des concepts disjonctifs subjectifs : il propose  deux procédures stockées qui peuvent être implémentées dans  tout système de gestion de base de données relationnelles pour  construire des requêtes formelles à partir de quelques exemples  illustrant la diversité de ce que l'utilisateur recherche. La  première procédure infère la fonction d'appartenance du concept imprécis  sous-jacent aux exemples représentatifs fournis, avec la particularité de  permettre d'exprimer des concepts complexes disjonctifs : elle est  capable de capturer à la fois les propriétés partagées par la  plupart des exemples représentatifs fournis et les propriétés  spécifiques présentes dans des exemples plus isolés. La seconde procédure  permet de construire la requête correspondant à ce concept flou.  }{SGBDR, requête par l'exemple, requête floue, concept disjonctif flou, intégrale de  Choquet.</p>
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