7576 search results - page 4 / 1516 » On Querying Ontologies and Databases |
SWAP
2007
13 years 8 months ago
2007
Abstract. Ontologies are pervading many areas of knowledge representation and management. To date, most research efforts have been spent on the development of sufficiently express...
DATESO
2009
13 years 5 months ago
2009
Ontology as a knowledge base can provide different reasoning tasks, e.g. to check consistency of the ontology or to check whether a resource is instance of a concept or not. In thi...
DLOG
2011
12 years 11 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...
SAC
2010
ACM
14 years 2 months ago
2010
ACM
Biological scientists have made large amounts of data available on the Web, which can be accessed by canned or precomputed queries presented via web forms. To satisfy further info...
ER
2004
Springer
13 years 11 months ago
2004
Springer
The semantic web envisions a World Wide Web in which data is described with rich semantics and applications can pose complex queries. Ontologies, a cornerstone of the semantic web,...