| Nowadays, many universities, enterprises and institutions have realized thecomputer managment of information. However, with the high development ofinformatization construction, more and more information systems are developed toadapt to different application requirements. These systems may be developed indifferent time, using diverse operating system and data management system or storagemodes, thereby leading their difference in the architecture, data type and method ofoperation, with the result that the heterogeneity of data source in the aspect of systemand modes. These decentralized information resources urgently need to implementsharing and integration as the growth of campus integration, e-commerce and e-government affairs. Therefore it is necessary to resolve heterogeneity of database usinguniform standard and software platform, thereby realizing mutual communication andexchange of different data management system and different format of data.According to the existing problem in the process of data exchange, on the basis ofanalyzing detailedly the research status of heterogeneous data exchange technology athome and abroad, studying on the architechre, working principle, function and interfaceof OGSA-DAI(Open Grid Service Architecture Data Access and Integration), a dataexchange model based on OGSA-DAI is presented, the architecture, schema mapping,ontology constructing, data exchange center and functions of each module of this modelare emphatically introduced. On the basis of the architecture of OGSA-DAI, combiningWeb Services and Ontology technology, this model import Ontology to describeheterogeneous data in the process of data exchange, using Ontology to make semanticannotations on XML Schema which is translated semantically and preliminary,pursuantly resove the semantic conflicts between heterogeneous data sources.Finally, after analyzing a certain university campus network’s the professionalbackground, several information systems in the campus network were extracted as theexperimental platform, this paper described in detail how to design and implement the data exchange system based on OGSA-DAI. |
