The SDSC storage resource broker
CASCON '98 Proceedings of the 1998 conference of the Centre for Advanced Studies on Collaborative research
SSDBM '04 Proceedings of the 16th International Conference on Scientific and Statistical Database Management
An ontology of time for the semantic web
ACM Transactions on Asian Language Information Processing (TALIP) - Special Issue on Temporal Information Processing
Artemis: integrating scientific data on the grid
IAAI'04 Proceedings of the 16th conference on Innovative applications of artifical intelligence
Semantic enabled metadata management in PetaShare
International Journal of Grid and Utility Computing
IAAI'07 Proceedings of the 19th national conference on Innovative applications of artificial intelligence - Volume 2
On agents and grids: Creating the fabric for a new generation of distributed intelligent systems
Web Semantics: Science, Services and Agents on the World Wide Web
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Metadata catalogs store descriptive information about logical data items. These catalogs can then be queried to retrieve the particular logical data item that matches the criteria. However, the query has to be formulated in terms of the metadata attributes defined for the catalog. Our work explores the concept of virtual metadata, where catalogs can be queried using metadata attributes not originally defined in the catalog. We use semantic web standards, where new metadata attributes can be taken from shared ontologies and can include expressive axioms to define the new terms. We have implemented a virtual metadata catalog as an extension of the Metadata Catalog Service (MCS), using the Web Ontology Language (OWL) and a reasoning engine to map queries of temporal nature in several metadata catalogs.