3480 search results - page 587 / 696 » General Image Database Model |
258
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SIGMOD
2010
ACM
15 years 8 months ago
2010
ACM
The proliferation of knowledge-sharing communities and the advances in information extraction have enabled the construction of large knowledge bases using the RDF data model to re...
116
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SIGMOD
1996
ACM
15 years 7 months ago
1996
ACM
Scheduling query execution plans is an important component of query optimization in parallel database systems. The problem is particularly complex in a shared-nothing execution en...
165
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DBPL
1993
Springer
15 years 7 months ago
1993
Springer
In this paper we study the expressive power of query languages for nested bags. We de ne the ambient bag language by generalizing the constructs of the relational language of Brea...
134
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DBPL
1989
Springer
15 years 7 months ago
1989
Springer
In the process of developing an Information System, one passes through stages that include requirements gathering, design specification, and software implementation. The purpose ...
143
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EDBT
2009
ACM
15 years 7 months ago
2009
ACM
In a database system, disclosure of confidential private data may occur if users can put together the answers of past queries. Traditional access control mechanisms cannot guard a...