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Commitment and Reasoner

Commitment and Reasoner. Reporter: Yan Tang Date: 7 July 2006 At: VUB STAR lab. Ontology reasoner. OWL DL reasoner DL reasoner RACER FaCT FaCT++ Pellet DIG reasoner via HTTP Why does OWL need a reasoner?

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Commitment and Reasoner

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  1. Commitment and Reasoner Reporter: Yan Tang Date: 7 July 2006 At: VUB STAR lab

  2. Ontology reasoner • OWL DL reasoner • DL reasoner • RACER • FaCT • FaCT++ • Pellet • DIG reasoner via HTTP • Why does OWL need a reasoner? • To enable inferences to be made about classes and individuals in an ontology • Other tools (RDF, KIF, etc)

  3. Why do we need a reasoner? • DOGMA approach is model theoretic approach • ORM is our current ontology design tool – lexon + commitment • ER diagram • 2 ways of “reasoning”: • Ground to the normal DL • Mapping to available models in commitment

  4. Simple analysis • For the fist possibility • Advantage: reuse available tools • Disadvantage: • Induction/deduction is hidden • Error proven is not guaranteed • For the second possibility • Advantage • Users can get enough information during mapping • Disadvantage • Node exhaustively explored, thus time consuming • Difficulty • Time consuming problem • Different models can represent similar concept

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