2228 search results - page 171 / 446 » A System for Semantic Query Optimization |
120
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PAKDD
1999
ACM
15 years 7 months ago
1999
ACM
Empirical equations are an important class of regularities that can be discovered in databases. In this paper we concentrate on the role of equations as de nitions of attribute val...
136
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VLDB
1999
ACM
15 years 7 months ago
1999
ACM
An important issue for federated systems of diverse data sources is optimizing cross-source queries, without building knowledge of individual sources into the optimizer. This pape...
151
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DEXAW
2007
IEEE
15 years 7 months ago
2007
IEEE
The vision of the Semantic Web is to make Web content machine-readable. To describe data, the Resource Description Framework has been extended with a schema-level and description ...
232
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ICDE
2008
IEEE
16 years 4 months ago
2008
IEEE
Aggregate measures summarizing subsets of data are valuable in exploratory analysis and decision support, especially when dependent aggregations can be easily specified and compute...
111
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SAC
2009
ACM
15 years 10 months ago
2009
ACM
Today user-centered information acquisition over collections of complex XML documents is increasingly in demand. To this end, preferences have become an important paradigm enablin...