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    JAPLL
    2010
    179views more  JAPLL 2010»
    Tractable query answering and rewriting under description logic constraints
    13 years 3 months ago
    Tractable query answering and rewriting under description logic constraints
    Download  www.comlab.ox.ac.uk
    Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
    Héctor Pérez-Urbina, Boris Motik, Ia...
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    ICDT
    2009
    ACM
    198views Database» more  ICDT 2009»
    Consistent query answering under primary keys: a characterization of tractable queries
    14 years 5 months ago
    Consistent query answering under primary keys: a characterization of tractable queries
    Download  ftp.umh.ac.be
    This article deals with consistent query answering to conjunctive queries under primary key constraints. The repairs of an inconsistent database db are obtained by selecting a max...
    Jef Wijsen
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    TOCL
    2008
    86views more  TOCL 2008»
    Conjunctive query containment and answering under description logic constraints
    13 years 4 months ago
    Conjunctive query containment and answering under description logic constraints
    Download  tocl.acm.org
    Diego Calvanese, Giuseppe De Giacomo, Maurizio Len...
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    AMW
    2010
    203views Knowledge Management» more  AMW 2010»
    Query Rewriting under Non-Guarded Rules
    13 years 6 months ago
    Query Rewriting under Non-Guarded Rules
    Download  sunsite.informatik.rwth-aachen.de
    We address the problem of answering conjunctive queries over knowledge bases, specified by sets of first-order sentences called tuple-generating dependencies (TGDs). This problem i...
    Andrea Calì, Georg Gottlob, Andreas Pieris
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    DLOG
    2008
    140views Automated Reasoning» more  DLOG 2008»
    Taming the Infinite Chase: Query Answering under Expressive Relational Constraints
    13 years 6 months ago
    Taming the Infinite Chase: Query Answering under Expressive Relational Constraints
    Download  sunsite.informatik.rwth-aachen.de
    Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
    Andrea Calì, Georg Gottlob, Michael Kifer
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