266 search results - page 1 / 54 » On first-order topological queries |
PODS
2004
ACM
14 years 11 months ago
2004
ACM
d abstract) Michael Benedikt Bell Labs Jan Van den Bussche Limburgs Universitair Centrum Christof L?oding Lehrstuhl Informatik VII RWTH Aachen Thomas Wilke Institut f?ur Informatik...
JSYML
2000
13 years 10 months ago
2000
PODS
2004
ACM
14 years 11 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...
ISMIS
2000
Springer
14 years 2 months ago
2000
Springer
A top-down query processing method for first order deductive databases under the disjunctive well-founded semantics (DWFS) is presented. The method is based upon a characterisation...
ICDT
2005
ACM
14 years 4 months ago
2005
ACM
We consider the problem of retrieving consistent answers over databases that might be inconsistent with respect to some given integrity constraints. In particular, we concentrate o...