2853 search results - page 156 / 571 » On the Efficiency of Provenance Queries |
168
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DEXAW
2009
IEEE
16 years 1 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...
190
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CIKM
2006
Springer
15 years 10 months ago
2006
Springer
In this paper, we propose an approach for efficient approximative RkNN search in arbitrary metric spaces where the value of k is specified at query time. Our method uses an approx...
163
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ERSHOV
2006
Springer
15 years 10 months ago
2006
Springer
In this work, we present a semantic query optimization technique to improve the efficiency of the evaluation of a subset of SQL:1999 recursive queries. Using datalog notation, we c...
172
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ISMIS
2000
Springer
15 years 10 months ago
2000
Springer
A top-down query processing method for first order deductive databases under the disjunctive well-founded semantics (DWFS) is presented. The method is based upon a characterisation...
200
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CIDR
2007
15 years 8 months ago
2007
Biologists are increasingly using databases for storing and managing their data. Biological databases typically consist of a mixture of raw data, metadata, sequences, annotations,...