1039 search results - page 63 / 208 » Query reformulation with constraints |
181
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ICWS
2008
IEEE
15 years 7 months ago
2008
IEEE
In this work, we present a framework for the semantic composition of web services based on Statecharts and uniform community service descriptions. Our model is a two step process....
158
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APWEB
2004
Springer
15 years 11 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
166
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KES
2007
Springer
16 years 8 days ago
2007
Springer
Abstract. Access control for semi-structured data is nontrivial, as witnessed by the number of access control approaches in recent literature. Recently a case has been made for exp...
176
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PODS
2000
ACM
15 years 10 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
254
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ICDT
2009
ACM
16 years 6 months ago
2009
ACM
This article deals with consistent query answering to conjunctive queries under primary key constraints. The repairs of an inconsistent database db are obtained by selecting a max...