429 search results - page 1 / 86 » A SAT approach to query optimization in mediator systems |
AMAI
2005
Springer
13 years 4 months ago
2005
Springer
Mediator systems integrate distributed, heterogeneous and autonomous data sources, but their e ective use requires the solution of hard query optimization problems. This is usuall...
WSKS
2009
Springer
13 years 9 months ago
2009
Springer
We propose a framework that supports a federated environment based on a Mediator Architecture in the Semantic Web. The Mediator supports mappings between the OWL Ontology of the Me...
KRDB
1998
13 years 6 months ago
1998
We present a semantic caching approach for optimizing the performance of information mediators. A critical problem with information mediators, particularly those gathering and int...
ICDT
1999
ACM
13 years 9 months ago
1999
ACM
In data integration systems, queries posed to a mediator need to be translated into a sequence of queries to the underlying data sources. In a heterogeneous environment, with sour...
ECAI
2000
Springer
13 years 9 months ago
2000
Springer
In this paper, we study unsatisfiable queries posed to a mediator in an information integration system and expressed in the logical formalism of the information integration system...