61 search results - page 4 / 13 » Query Rewriting Algorithm Evaluation for XML Security Views |
ER
2005
Springer
13 years 12 months ago
2005
Springer
Query rewriting is a fundamental task in query optimization and data integration. With the advent of the web, there has been renewed interest in data integration, where data is dis...
SIGMOD
2006
ACM
14 years 6 months ago
2006
ACM
We study the problem of finding efficient equivalent viewbased rewritings of relational queries, focusing on query optimization using materialized views under the assumption that ...
BDA
2001
13 years 7 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 ...
SIGMOD
2007
ACM
14 years 6 months ago
2007
ACM
This paper investigates a class of transform queries proposed by XQuery Update [6]. A transform query is defined in terms of XML update syntax. When posed on an XML tree T, it ret...
KES
2007
Springer
14 years 17 days ago
2007
Springer
Abstract. Access control for semi-structured data is nontrivial, as witnessed by the number of access control approaches in recent literature. Recently a case has been made for exp...