1283 search results - page 62 / 257 » Reasoning With Weighted Ontologies |
166
click to vote
DLOG
2007
15 years 8 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...
254
click to vote
LPNMR
2011
Springer
14 years 9 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...
173
click to vote
COOPIS
2003
IEEE
15 years 11 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...
190
click to vote
DLOG
2011
14 years 9 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...
193
click to vote
DLOG
2011
14 years 9 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...