1529 search results - page 119 / 306 » Querying for meta knowledge |
165
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P2P
2007
IEEE
16 years 20 days ago
2007
IEEE
Range queries are a very powerful tool in a wide range of data management systems and are vital to a multitude of applications. The hierarchy of structured overlay systems can be ...
155
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GCC
2007
Springer
16 years 17 days ago
2007
Springer
Data integration has evolved to provide efficient data management across distributed and heterogeneous data sources in grid environment. However, existing works in data integratio...
178
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VLDB
2004
ACM
15 years 11 months ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
187
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WIDM
2003
ACM
15 years 11 months ago
2003
ACM
Ontologies play an important role in the Semantic Web. Currently, several Web ontology languages have been proposed and there has been a substantial effort towards the formalizat...
167
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VLDB
1998
ACM
15 years 10 months ago
1998
ACM
Query optimizers normally compile queries into one optimal plan by assuming complete knowledge of all cost parameters such asselectivity and resourceavailability. The execution of...