The Research And Application Of Web Data Integration Based On Ontology

Along with the development of network and distribute application and universality, a great deal of difference Heterogeneous data emerge with the tide of the times.Especially with current Web technique rapid development, people obtain the a great deal of information come from the Web. The Web is not only a huge information commercial center, but also in the meantime a huge problem-information deluge, congestion. It brings a lot of difficults in obtaintion of Web top information and use.How to obtain a great deal of information from web and use it effectively, this is a hotspot which many top organizations and associations are researching, and it is also one of the key techniques in Web information management.So this paper introduce Ontology concept to realize difference Heterogeneous Web data integration, Usage of Ontology has many advantages to solve a data integration medium of semantic Heterogeneous problem, this is other data integration technique be very difficult realization. This paper puts the main foucs on obtaining data and data integration after introducting of basic principle of the Semantic Web and related standard.The process that the data obtain is divided into three stage: The definition sample rule, obtain a web page and clean a page, format conversion. Firstly, with the users' participation, the process studies the rules according to the sample page. Secondly, the process downloads pages and makes use of Tidy tool to clean web page. Finally, system completes sample of data and converses the data. This paper introduces the basic method bases on DOM tree, and improvement of the method bases on semantic block.The process of data integration include: Setting up a realm Ontology, mapping Ontology and database, search processing.The Ontology is foundation of semantic integration, The dissertation demonstrates a set of realm Ontology ways, model tools, the database example semantic mark and search processing process.The end of dissertation refers to the summary of this paper, outlook, and puts forward the problem in this aspect that need to be researched and improved constantly.