Research And Application On The Exchange Of Heterogeneous Data

Data exchanging is the demand of coordination between not only different enterprises but also different departments inside them, and the goal is to realize data sharing between heterogeneous data sources, so as to utilize resources effectively and attain high performance of the whole application system. But, there exist all kinds of conflicts of structural and semantic in data. The goal of data exchanging is to remove these conflicts. How to describe and remove these conflicts conveniently is very important to data exchanging.The characters for XML showed in this model, which includes platform independence, easy for expansion, better interaction, abundance semantic, make the middleware model easy for the realization of description and transform for heterogeneous data sources in the field of data exchanging. XML is used for the exchanging of relational data and the paper makes a research on basic methods of data exchanging by the analyzing of XML technology and relational data.The research of this paper begins with the theory of heterogeneous data . Data and structure are divided into two different XML documents. WhileExchanging, match structure at first, and then integrates data. And the paper classifies the structure and semantic conflicts of heterogeneous data in detail and make a definition of special XML documents that are used to describe heterogeneous data to solve the problem that the complex information about data structure and data semanteme is not showed in relevance ways by DTD and XML Schema. Finally, the paper comes up with a data exchanging model and makes use of orient-object model designing idea to analyse , design and realize the data exchanging model in the Information System of Port.