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    2011
    194views Automated Reasoning» more  DLOG 2011»
    Mapping Data to Higher-Order Description Logic Knowledge Bases
    12 years 8 months ago
    Mapping Data to Higher-Order Description Logic Knowledge Bases
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    Floriana Di Pinto, Giuseppe De Giacomo, Maurizio L...
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    DLOG
    2011
    304views Automated Reasoning» more  DLOG 2011»
    DL-Lite with Attributes and Sub-Roles (Extended Abstract)
    12 years 8 months ago
    DL-Lite with Attributes and Sub-Roles (Extended Abstract)
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    Alessandro Artale, Yazmin Angélica Ib&aacut...
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    DLOG
    2011
    256views Automated Reasoning» more  DLOG 2011»
    On (In)Tractability of OBDA with OWL 2 QL
    12 years 8 months ago
    On (In)Tractability of OBDA with OWL 2 QL
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    We show that, although conjunctive queries over OWL 2 QL ontologies are reducible to database queries, no algorithm can construct such a reduction in polynomial time without changi...
    Stanislav Kikot, Roman Kontchakov, Michael Zakhary...
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    DLOG
    2011
    251views Automated Reasoning» more  DLOG 2011»
    Status QIO: An Update
    12 years 8 months ago
    Status QIO: An Update
    Download  sunsite.informatik.rwth-aachen.de
    We prove co-N2ExpTime-hardness for conjunctive query entailment in the description logic ALCOIF , thus improving the previously known 2ExpTime lower bound. The result transfers to ...
    Birte Glimm, Yevgeny Kazakov, Carsten Lutz
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    DLOG
    2011
    251views Automated Reasoning» more  DLOG 2011»
    Goal-oriented Query Rewriting for OWL 2 QL
    12 years 8 months ago
    Goal-oriented Query Rewriting for OWL 2 QL
    Download  sunsite.informatik.rwth-aachen.de
    We present an optimized query rewriting algorithm for OWL 2 QL that computes the rewriting set of a user query by avoiding unnecessary inferences and extended clause subsumption ch...
    Alexandros Chortaras, Despoina Trivela, Giorgos B....
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