The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
Dataflow plan execution for software agents
AGENTS '00 Proceedings of the fourth international conference on Autonomous agents
Grid Information Services for Distributed Resource Sharing
HPDC '01 Proceedings of the 10th IEEE International Symposium on High Performance Distributed Computing
A Core Grid Ontology for the Semantic Grid
CCGRID '06 Proceedings of the Sixth IEEE International Symposium on Cluster Computing and the Grid
An overview of S-OGSA: A Reference Semantic Grid Architecture
Web Semantics: Science, Services and Agents on the World Wide Web
An ActOn-based semantic information service for Grids
Future Generation Computer Systems
A semantic information system for services and traded resources in Grid e-markets
Future Generation Computer Systems
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We describe an information service that aggregates metadata available in hundreds of information sources of the EGEE Grid infrastructure. It uses an ontology-based information integration architecture (ActOn), which is suitable the highly dynamic distributed information sources available in Grid systems, where information changes frequently and where the information of distributed sources has to be aggregated in order to solve complex queries. These two challenges are addressed by a metadata cache that works with an update-on-demand policy and by an information source selection module that selects the most suitable source at a given point in time, respectively. We have evaluated the quality of this information service, and compared it with other similar services from the EGEE production testbed, with promising results.