142 search results - page 20 / 29 » On the Existence of Answer Sets in Normal Extended Logic Pro... |
ICDE
1992
IEEE
13 years 11 months ago
1992
IEEE
Contrary to popular belief, relation schemes in good classical normal forms are not necessarily devoid of redundancies. This arises from the fact that classical data dependencies ...
ECSQARU
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. The problem of merging multiple sources information is central in several domains of computer science. In knowledge representation for artificial intelligence, several a...
DLOG
2008
13 years 10 months ago
2008
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
PODS
1995
ACM
13 years 11 months ago
1995
ACM
Databases are often incomplete because of the presence of disjunctive information, due to con icts, partial knowledge and other reasons. Queries against such databases often ask q...
JAR
2007
13 years 7 months ago
2007
As applications of description logics proliferate, efficient reasoning with knowledge bases containing many assertions becomes ever more important. For such cases, we developed a n...