1283 search results - page 62 / 257 » Reasoning With Weighted Ontologies |
100
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DLOG
2007
15 years 2 months ago
2007
We outline DLMedia, an ontology mediated multimedia information retrieval system, which combines logic-based retrieval with multimedia featurebased similarity retrieval. An ontolog...
153
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LPNMR
2011
Springer
14 years 2 months ago
2011
Springer
We present an approach to integrating rules and ontologies on the basis of the first-order stable model semantics defined by Ferraris, Lee and Lifschitz. We show that a few exist...
102
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COOPIS
2003
IEEE
15 years 5 months ago
2003
IEEE
Ontologies as means for formally specifying the vocabulary and relationship of concepts are seen playing a key role on the Semantic Web. However, the Web’s distributed nature mak...
125
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DLOG
2011
14 years 3 months ago
2011
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...
111
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DLOG
2011
14 years 3 months ago
2011
We show that deciding conjunctive query inseparability for OWL 2 QL ontologies is PSpace-hard and in ExpTime. We give polynomial-time (incomplete) algorithms and demonstrate by exp...