1529 search results - page 58 / 306 » Querying for meta knowledge |
219
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SIGMOD
2008
ACM
16 years 6 months ago
2008
ACM
This article proposes a core query algebra for probabilistic databases. In essence, this core is part of the query languages of most probabilistic database systems proposed so far...
161
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ICLP
2007
Springer
16 years 13 days ago
2007
Springer
Abstract. The system presented in this paper aims at using Contextual Logic Programming as a computational hub for knowledge modeled by web ontologies and enable querying that repr...
162
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ESWS
2008
Springer
15 years 8 months ago
2008
Springer
Accessing structured data such as that encoded in ontologies and knowledge bases can be done using either syntactically complex formal query languages like SPARQL or complicated fo...
164
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KDD
1994
ACM
15 years 10 months ago
1994
ACM
Semantic query optimization can dramatically speed up database query answering by knowledge intensive reformulation. But the problem of how to learn required semantic rules has no...
312
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AMW
2011
14 years 10 months ago
2011
Abstract. We consider the problem of checking equivalence of conjunctive queries with inequalities under bag (multiset) semantics. The problem is known to be decidable in pspace an...