Data Integration System Based on Ontology
Hao Li · Jisuanji gongcheng · 2007
Due to the demand of integration of heterogeneous data sources,a semantic-based data integration system with three layers is designed,in which a middle layer between user layer and data layer is added to hide heterogeneity of various data sources.In practice,this paper introduces the ontology used as a common semantic description,and establishes the mapping between the ontology and heterogeneous data sources,and applies Web ontology language(OWL) to describe the ontology and the mapping.A heterogeneous data integration system,which can translate ontology-based global query into data-sources-based local query,is designed and realized to resolve the problem of semantic heterogeneity.Key technologies are discussed.