Research Of Heterogeneous Data Integration With An Ontology_Based Method

With the rapid development of Computer&Network,especially with maturance of XML technology ,integration of heterogeneous data sources is becoming become one of the hotspots in the research..The Problem of semantic heregeneous of data sources can't be resolved smoothly by applying XML alone. So the paper complies an ontology-Based means to integrate heterogeneous data sources together with the help of XML technology.This paper introduces the background knowledge of heterogeneous data integration, as well as the knowledge of data integration. On the basis of the above, The author develops an ontology-based Heterogeneous data Integration prototype system, expounds the main framework and essiontial technology. Then the paper introduces its work in detail: it explains the very significance of using ontology as an comon semantic description and an global query model ,and illustrates the reason fo adopting LAV method ; then it builds the formal representation of the mapping between ontology and data resources, applies OWL to describe the ontology and the mapping ; defines a query language named by DIQL to query on our integration system , and supply the detailed arithmetic of reolving partial binding of LAV method,locating of data sources and query rewriting,etc. Finally,the paper demostrates and proves the result of research by examples .