2228 search results - page 169 / 446 » A System for Semantic Query Optimization |
164
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JIDM
2010
14 years 10 months ago
2010
The increasing volume of data stored as XML documents makes fragmentation techniques an alternative to the performance issues in query processing. Fragmented databases are feasible...
157
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BMCBI
2008
15 years 3 months ago
2008
Background: Ontologies such as the Gene Ontology can enable the construction of complex queries over biological information in a conceptual way, however existing systems to do thi...
143
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CADE
2012
Springer
13 years 5 months ago
2012
Springer
The problem of SPARQL query containment is defined as determining if the result of one query is included in the result of another for any RDF graph. Query containment is important...
119
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SIGMOD
1999
ACM
15 years 7 months ago
1999
ACM
We explore the execution of queries with client-site userdefined functions (UDFs). Many UDFs can only be executed at the client site, for reasons of scalability, security, confide...
132
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SSDBM
1999
IEEE
15 years 7 months ago
1999
IEEE
In many scientific domains, experimental devices or simulation programs generate large volumes of data. The volumes of data may reach hundreds of terabytes and therefore it is imp...