Optimization algorithms for distributed queries
Distributed systems, Vol. II: distributed data base systems
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
SAC '97 Proceedings of the 1997 ACM symposium on Applied computing
A mediation infrastructure for digital library services
DL '00 Proceedings of the fifth ACM conference on Digital libraries
The state of the art in distributed query processing
ACM Computing Surveys (CSUR)
Reconciling schemas of disparate data sources: a machine-learning approach
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Scaling Access to Heterogeneous Data Sources with DISCO
IEEE Transactions on Knowledge and Data Engineering
A Hash Partition Strategy for Distributed Query Processing
EDBT '96 Proceedings of the 5th International Conference on Extending Database Technology: Advances in Database Technology
Don't Scrap It, Wrap It! A Wrapper Architecture for Legacy Data Sources
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
The Anatomy of the Grid: Enabling Scalable Virtual Organizations
International Journal of High Performance Computing Applications
A novel approach to resource scheduling for parallel query processing on computational grids
Distributed and Parallel Databases
Grid Enabled Data Integration Framework for Bioinformatics Research
GCCW '06 Proceedings of the Fifth International Conference on Grid and Cooperative Computing Workshops
A New Architecture of Data Access Middleware under Grid Environment
APSCC '06 Proceedings of the 2006 IEEE Asia-Pacific Conference on Services Computing
Effective keyword-based selection of relational databases
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
A Service-Oriented System to Support Data Integration on Data Grids
CCGRID '07 Proceedings of the Seventh IEEE International Symposium on Cluster Computing and the Grid
SLA-based Data Integration on Database Grids
COMPSAC '07 Proceedings of the 31st Annual International Computer Software and Applications Conference - Volume 02
Data Model and Virtual Database Engine for Grid Environment
GCC '07 Proceedings of the Sixth International Conference on Grid and Cooperative Computing
Novel mediator architectures for Grid information systems
Future Generation Computer Systems
Query planning in the presence of overlapping sources
EDBT'06 Proceedings of the 10th international conference on Advances in Database Technology
Configuring intelligent mediators using ontologies
EDBT'06 Proceedings of the 2006 international conference on Current Trends in Database Technology
Distributed semantic caching in grid middleware
DEXA'07 Proceedings of the 18th international conference on Database and Expert Systems Applications
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This paper proposes ORS, an original strategy to reduce the number of data sources to access during query evaluation in large scale mediation systems. ORS proceeds first selecting sources using extensional (data) information to discard useless sources and then validates the intentional (schema) information that each one is able to provide. The first step is based on location queries on some "well chosen" data sources, that previously had made a consolidation integration effort. This paper proposes ORS to improve querying semantic virtual objects whose instances are distributed across numerous data sources. Cost analysis and implementation in a grid context are also presented.