269 search results - page 2 / 54 » On Tree Pattern Query Rewriting Using Views |
ICDT
2005
ACM
13 years 10 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...
DBSEC
2006
13 years 6 months ago
2006
Most state-of-the-art approaches of securing XML documents are based on a partial annotation of an XML tree with security labels which are later propagated to unlabeled nodes of th...
AMW
2009
13 years 5 months ago
2009
Abstract. Rewriting of conjunctive queries using views has many applications in database and data integration. We investigate ways to improve performance of rewriting and propose a...
DOCENG
2003
ACM
13 years 10 months ago
2003
ACM
XPath [3, 5] is a powerful and quite successful language able to perform complex node selection in trees through compact specifications. As such, it plays a growing role in many ...
BDA
2001
13 years 6 months ago
2001
A Community Web portal is a set of tools for a community of people who want to share information on a certain domain via the Web. The backbone of this system is an ontology which ...