293 search results - page 15 / 59 » Efficiently Querying Relational Databases Using OWL and SWRL |
DEXAW
2009
IEEE
15 years 6 months ago
2009
IEEE
— The amount of semantic data on the Web has increased exponentially in the last years. One of the main reasons for this is the use of RDB2RDF systems, which generate RDF data fr...
107
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DLOG
2008
15 years 1 months ago
2008
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
133
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DASFAA
2004
IEEE
15 years 3 months ago
2004
IEEE
Relational index structures, as for instance the Relational Interval Tree or the Linear Quadtree, support efficient processing of queries on top of existing object-relational datab...
189
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SIGMOD
2008
ACM
15 years 11 months ago
2008
ACM
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems, which generate structured relation...
108
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DPD
2002
14 years 11 months ago
2002
A major cost in executing queries in a distributed database system is the data transfer cost incurred in transferring relations (fragments) accessed by a query from different sites...