1004 search results - page 22 / 201 » Safe Constraint Queries |
IJCAI
2003
13 years 10 months ago
2003
In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global i...
RR
2010
Springer
13 years 7 months ago
2010
Springer
Based on practical observations on rule-based inference on RDF data, we study the problem of redundancy elimination on RDF graphs in the presence of rules (in the form of Datalog r...
ICDE
2009
IEEE
14 years 10 months ago
2009
IEEE
Abstract-- We consider a novel problem of top-k query processing under budget constraints. We provide both a framework and a set of algorithms to address this problem. Existing alg...
ICDT
1995
ACM
14 years 7 days ago
1995
ACM
Abstract. Extension of the relational database model to represent complex data has been a focus of much research in recent years. At the same time, an alternative extension of the ...
AICOM
2004
13 years 8 months ago
2004
Abstract. We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous informatio...