18 search results - page 3 / 4 » Query rewriting using views in the presence of inclusion dep... |
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
The prevalent use of XML highlights the need for a generic, flexible access-control mechanism for XML documents that supports efficient and secure query access, without revealing ...
DBPL
2001
Springer
13 years 9 months ago
2001
Springer
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
JIIS
2006
13 years 5 months ago
2006
Abstract In recent years, researchers have begun to study inductive databases, a new generation of databases for leveraging decision support applications. In this context, the user...
VLDB
1999
ACM
13 years 9 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
SEMWEB
2010
Springer
13 years 3 months ago
2010
Springer
Given the large number of Semantic Web Services that can be created from online sources by using existing annotation tools, expressive formalisms and efficient and scalable approac...