Querying Heterogeneous Information Sources Using Source Descriptions
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This paper introduces a novel wrapper-mediator based semantic data grid service mechanism to solve the problem of Semantic heterogeneity and few compatible data sources. It uses ontology based semantic information to wrap the heterogeneous data source, and employs mediator structure to supply accessing interface for the data sources, and it extends semantic query, mapping and fusion languages to support semantic grid communication mechanism. The extension of XML algebra with semantic query enhanced is discussed to enable semantic querying on data gird environment.