关于语义网格环境中异构数据资源整合的研究

目前,许多电子政务系统面临着一个共同的问题,这就是所谓的“信息孤岛”问题,解决该问题的关键是如何将现有数据资源进行有效的整合.而语义网格理论的提出,为这一难题的解决提供了一个新的思路.应用语义网格理论,针对劳动力市场信息化的应用需求,构造了语义网格模型LF-Grid,并且实现了一种利用本体整合分布式异构数据库资源的机制,有效地解决了这一问题.

Heterogeneous Data Resources Integrating in Semantic Grid Enviroment

At present,many e-govenment systems are up against a common problem,namely information island.In the face of more and more distributed heterogeneous data resources,it becomes very hard to use all of the information in a correct,uniform and effective way.It is the key for resolving that problem to integrate the data sources in existence.The traditional methods in this domain including data federation and data warehouse technology etc.But the products of these technologys doesn't work well together with the legatary systems and call for much pay.The semantic grid theory which combines semantic web and the grid brings us a new method to do the job.With the help of ontologys in semantic grid,we can standardize vocabularys from different databases.This is the base to remedy the problem of semantic heterogeneity.Basing on the theory,this paper puts forwards a prototype of semantic grid called Labour Force Grid(LF-Grid) and implements a mechanism of mapping from ontology to databases as well as a arithmetic for constructing querys.Using these components LF-Grid can convert a user's demand into SQL statements for each database and integrate the results to form a complete one.The mechanism and its arithmetics successfully solved the problem about how to make use of distributed heterogeneous data resources synthetically and provides grid customers with services which are of high efficiency and easy to use.