1529 search results - page 40 / 306 » Querying for meta knowledge |
187
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COOPIS
2003
IEEE
15 years 11 months ago
2003
IEEE
The use of semantic knowledge in its various forms has become an important aspect in managing data in database and information systems. In the form of integrity constraints, it ha...
191
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VLDB
2004
ACM
15 years 11 months ago
2004
ACM
Query containment is the most fundamental relationship between a pair of database queries: a query Q is said to be contained in a query Q if the answer for Q is always a subset of...
166
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PVLDB
2008
15 years 5 months ago
2008
Brighthouse is a column-oriented data warehouse with an automatically tuned, ultra small overhead metadata layer called Knowledge Grid, that is used as an alternative to classical...
189
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SSDBM
1999
IEEE
15 years 10 months ago
1999
IEEE
In this paper, we present a query system that has been implemented in a practical biological database - GPCRDB. Distinguishing features of this system include: smart query relaxat...
216
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RR
2010
Springer
15 years 4 months ago
2010
Springer
Role-based access control is a standard mechanism in information systems. Based on the role a user has, certain information is kept from the user even if requested. For ontologies ...