789 search results - page 41 / 158 » On Theory Revision with Queries |
ICDT
1990
ACM
15 years 3 months ago
1990
ACM
Ordinary logical implication is not enough for answering queries in a logic database, since especially negative information is only implicitly represented in the database state. M...
CSL
2010
Springer
14 years 12 months ago
2010
Springer
We study probabilistic complexity classes and questions of derandomisation from a logical point of view. For each logic L we introduce a new logic BPL, bounded error probabilistic ...
GIS
2000
ACM
14 years 11 months ago
2000
ACM
Traditionally, the classes in thematic maps have been treated as crisp sets, using classical set theory. In this formulation, map classes are assumed to be mutually exclusive and e...
SAC
1994
ACM
15 years 3 months ago
1994
ACM
In this paper, the interest of fuzzy sets and possibility theory in the context of databases is presented. It is shown that these " notions provide an homogeneous framework f...
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ADBIS
2000
Springer
15 years 4 months ago
2000
Springer
Queries involving aggregation are typical in a number of database research areas, such as data warehousing, global information systems and mobile computing. One of the main ideas ...