Research Of Heterogeneous Data Integration Based On The Ontology And XML Schema

In the construction of digital campus, for various reasons, all departments develop information systems based on different platforms and data sources in accordance with their information requirements and specific application. How to integrate these information systems, to realize the integrated data sharing, and to provide all the teachers and students with a unified integration sharing platform, is of great significance for the construction of a digital campus.To manage the crucial issue of heterogeneous data integration in the digital campus construction, this paper firstly introduces the status quo of data integration; then analyzes the major problems which need to be solved, common methods and techniques in the data integration; and briefly introduces the ontology and XML technology; lastly proposes an outline for the practical programme based on the ontology and XML Schema of heterogeneous data integration .To achieve the above solutions, the author carried out a research concentrated on the following three aspects. First, the Ontology construction and the conversion and integration of mode; Second, the general enquiries and their decomposition ; and third, the partial enquiries and optimization. Core issue is the analysis of critical technology to be solved in the heterogeneous data integration, which includes: the building of partial ontology and overall ontology of campus data; their conversion between the relation model and the XML schema and the conflict resolution of XML schema; the effective decomposition of xquery overall enquiry language; the analysis and realization of partial enquiries. Meanwhile, with the overall objectives ,the requirements as well as characteristics of heterogeneous data integration construction in Hunan University of Science and Engineering, the author proposes the data integration system structure based on the ontology and XML schema, constructs and realizes the data integration sharing platform of Hunan University of Science and Engineering, and achieves a better unified management and sharing enquiries of heterogeneous data integration. The solutions proposed on heterogeneous data integration based the Ontology and XML schema in this paper, have great significance to share with heterogeneous data integration not only in schools, but also in governments, enterprises, companies and other departments.