Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
The state of the art in distributed query processing
ACM Computing Surveys (CSUR)
Meta-Data Based Mediator Generation
COOPIS '98 Proceedings of the 3rd IFCIS International Conference on Cooperative Information Systems
XML Based Semantic Data Grid Service
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part I: ICCS 2007
Semantic Fusion for Query Processing in Grid Environment
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part II
Dynamic Source Selection in Large Scale Mediation Systems
Globe '08 Proceedings of the 1st international conference on Data Management in Grid and Peer-to-Peer Systems
Evolution of Query Optimization Methods: From Centralized Database Systems to Data Grid Systems
DEXA '09 Proceedings of the 20th International Conference on Database and Expert Systems Applications
Metadata miner assisted integrated information retrieval for Argo ocean data
SMC'09 Proceedings of the 2009 IEEE international conference on Systems, Man and Cybernetics
Grid data integration based on schema mapping
PARA'06 Proceedings of the 8th international conference on Applied parallel computing: state of the art in scientific computing
IEEE Transactions on Information Technology in Biomedicine
Cloud-based mediation and access of healthcare data in the @neurIST project
Euro-Par 2010 Proceedings of the 2010 conference on Parallel processing
XML based semantic query mechanism on grid
ISPA'06 Proceedings of the 2006 international conference on Frontiers of High Performance Computing and Networking
XML data integration in OGSA grids
DMG 2005 Proceedings of the First VLDB conference on Data Management in Grids
A metadata classification assisted scientific data extraction architecture
GPC'10 Proceedings of the 5th international conference on Advances in Grid and Pervasive Computing
A scientific data extraction architecture using classified metadata
The Journal of Supercomputing
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Virtualization is one of the key features of the Grid. As data-intensive applications gain on importance, it becomes crucial for the success of the Grid to provide transparent access to distributed/heterogeneous data sources as well. In this paper, we describe our concepts to provide a Virtual Data Source (VDS) - a logically single homogeneous data source - on the Grid. Various data sources like relational/XML databases and comma separated value files can be combined via a Mapping Schema. By allowing to invoke user defined functions during the mediation a flexible way of resolving heterogeneities is provided. To show the feasibility of the developed concepts and elaborate the basis for a dynamic version they have been seamlessly integrated into OGSA-DAI to provide a non-proprietary, centralized and easy to integrate solution.