765 search results - page 7 / 153 » Query Processing over Incomplete Autonomous Databases |
158
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SIGMOD
2005
ACM
15 years 10 months ago
2005
ACM
Statistical estimation and approximate query processing have become increasingly prevalent applications for database systems. However, approximation is usually of little use witho...
SSDBM
2002
IEEE
15 years 2 months ago
2002
IEEE
This paper presents an approach to answering queries over an ontology modelled using a description logic. The ontology acts as a global schema, providing a declarative description...
157
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ICDE
1999
IEEE
15 years 11 months ago
1999
IEEE
We develop a data integration approach for the efficient evaluation of queries over autonomous source databases. The approach is based on some novel applications and extensions of...
SIGMOD
2004
ACM
15 years 10 months ago
2004
ACM
Database selection is an important step when searching over large numbers of distributed text databases. The database selection task relies on statistical summaries of the databas...
161
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ICDE
2007
IEEE
15 years 11 months ago
2007
IEEE
Text documents often embed data that is structured in nature. By processing a text database with information extraction systems, we can define a variety of structured "relati...