726 search results - page 45 / 146 » Extended Query Answering Using Integrity Rules |
ICDT
1995
ACM
15 years 3 months ago
1995
ACM
A tuple t1 of relation R subsumes tuple t2 of R, with respect to a query Q if for every database, tuple t1 derives all, and possibly more, answers to query Q than derived by tuple ...
KDD
2004
ACM
16 years 6 days ago
2004
ACM
In this paper we provide a fast, data-driven solution to the failing query problem: given a query that returns an empty answer, how can one relax the query's constraints so t...
IDEAS
2005
IEEE
15 years 5 months ago
2005
IEEE
Traditional approaches to query processing aim at rewriting a given query into another more efficient one that uses less time and/or resources during the execution. There by, the...
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IDEAS
2003
IEEE
15 years 5 months ago
2003
IEEE
The objective of this paper is to investigate the problems related to the extensional integration of information sources. In particular, we propose an approach for managing incons...
CCS
2001
ACM
15 years 4 months ago
2001
ACM
XML is increasingly becoming the format of choice for information exchange on the Internet. As this trend grows, one can expect that documents (or collections thereof) may get qui...