【作者】 杨波；

【导师】 牛存良；

【作者基本信息】 河北工业大学 ， 计算机应用技术， 2007， 硕士

【摘要】 随着Internet的飞速发展,网络迅速成为一种重要的信息传播和交换的手段,在Web上出现了丰富的数据资源。为了更有效的利用这些数据资源,需要在一个统一的平台上对这些数据资源进行集成和访问。传统的数据库集成方法已经逐渐不能适应人们获取数据的需求,它们在动态的添加或删除数据源方面、支持异构数据源之间的互操作性方面及如何模型化源数据内容和用户查询等方面存在着许多的不足。因此,本文提出了一种以XML为数据交换格式,使用XML Schema建立全局模型,Mediator集成模式的基于Web Service框架的异构数据库数据集成中间件HDIM。通过在分布式环境下建立一个公共的集成环境,屏蔽了各个异构数据源的平台、系统环境、内部数据结构等方面的异构性,对它们进行无缝连接,为用户提供一个统一和透明的访问接口,实现了对异构数据源间关联数据的访问和发布。本文主要研究内容如下:1)提出异构数据源集成中间件HDIM体系结构的设计。提出并设计了以XML为共享数据的交换格式的模式异构数据库数据集成中间件HDIM。2)将Web Service技术融入到异构数据集成的系统框架中,实现了应用系统前端和局部数据源包装的零维护。3)关系模式到XML模式转换算法的设计和实现。通过对数据库关系模式和XML Schema分析,提出了合理有效的关系模式到XML Schema模式转换算法。4)数据查询处理器和结果集成器的结构设计及算法流程;提出了查询分配算法,对基于GAV方法的查询分配算法在权限控制方面进行了改进。更多还原

【Abstract】 With the rapid development of Internet, the network is rapidly becoming an important means of information dissemination and exchange, on the web a wealthy of information resources. To make an effective use of those data source, we need a unifie platform for data integration and visit.The traditional way of data integration has far from the people’need of obtaining data.There are a lot of defects in dynamic adding or deleting data sources,supporting the interoperability among heterogeneous data source,the way of making mode of data source contents as a model and custom query and so on.Thus the paper proposes a kind of design and realizing program, which uses XML data transforming format, XML Schema to built a public model and Heterogeneous Data Integration Middleware (HDIM) and it is based on the framework of the Web Service.To set up a public integrated environment under distributed which shields all the differences in aspects of data source including the platform, system environment and internal data structure and so on. It provides a unified and transparent interface for all the users to implement the accession and publication of relative data among heterogeneous data sources. The followings are the main study of the content:1)The design of the mediator of heterogeneous data source integration. Present and design HDIM, which is based on XML as shared data transforming format.2)Using the technology of Web Service into the HDIM.It plays an effort that makes client side and the wrapper none of the maintaining.3)The design and realization from the public model to XML model.Through the analysis of the public model of databases and XML Schema, the transform from relation schema to reasonable and effective XML schema is proposed.4)The structure design and the arithmetic flow of the data inquiry processor and result integration processor.The inquiry assign arithmetic is presented. The inquiry assign base on GAV technology is improved in the aspect of the purview control.更多还原