1654 search results - page 120 / 331 » Ontology Based Query Processing in Database Management Syste... |
173
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PPAM
2005
Springer
15 years 12 months ago
2005
Springer
Abstract. In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorit...
190
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BMCBI
2006
15 years 6 months ago
2006
Background: This article addresses the problem of interoperation of heterogeneous bioinformatics databases. Results: We introduce BioWarehouse, an open source toolkit for construc...
185
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SIGMOD
1999
ACM
15 years 10 months ago
1999
ACM
Selectivity estimation of queries is an important and wellstudied problem in relational database systems. In this paper, we examine selectivity estimation in the context of Geogra...
173
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WWW
2009
ACM
16 years 7 months ago
2009
ACM
Web search engines are facing formidable performance challenges as they need to process thousands of queries per second over billions of documents. To deal with this heavy workloa...
175
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CIDR
2009
15 years 7 months ago
2009
Recent research in domain-independent information extraction holds the promise of an automatically-constructed structured database derived from the Web. A query system based on th...