1004 search results - page 60 / 201 » Safe Constraint Queries |
ICDE
2006
IEEE
14 years 11 months ago
2006
IEEE
Current approaches for answering queries with imprecise constraints require user-specific distance metrics and importance measures for attributes of interest - metrics that are ha...
GLOBE
2009
Springer
14 years 2 months ago
2009
Springer
Abstract. We show how to specify and use the metadata for a virtual and relational data integration system under the local-as-view (LAV) approach. We use XML and RuleML for represe...
ICDE
2006
IEEE
14 years 11 months ago
2006
IEEE
ConQueSt is a constraint-based querying system devised with the aim of supporting the intrinsically exploratory nature of pattern discovery. It provides users with an expressive c...
VLDB
2007
ACM
14 years 10 months ago
2007
ACM
The performance of XML database queries can be greatly enhanced by rewriting them using materialized views. We study the problem of rewriting a query using materialized views, whe...
DAISD
1994
13 years 11 months ago
1994
We are interested in the problem of validating the consistency of integrity constraints when data is modi ed. In particular, we consider how constraints can be checked with only p...