面向服务的数字图书馆QGSA-DQP分布式信息查询研究

同传统图书馆相比,数字图书馆在利用计算机技术、网络通信技术、面向对象的程序设计技术、数据库技术等方面集成了大量数字化资源;在资源的加工、交流传播的服务手段和形式、数字资源的共建和共享方面有了质的飞跃。然而,如何实现各个操作系统不同、运行平台各异、分布的、多个异构数字图书馆间的共享与集成是一个非常迫切的问题。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。而网格理论的提出,为这一难题的解决提供了一个新的思路。结合我国数字图书馆的发展状况,提出了一个基于QGSA-DQP的分布式异构数据库信息检索模型,并从技术实现上进行了可行性的研究。

Comparing with traditional library, digital library collects huge amount of digital resources by making us of various technologies of computer, Intemet and object - oriented programming as well as database. All of these technologies bring qualitative change to data processing, transfonnafion and sharing. However, how to realize resource co- construction and sharing among different digital libraries that are structural isomerism is an urgent problem needs to be solved. The theory of Grid gives an excellent resolution to this problem. This paper, according to digital library development status in our country, puts forward a retrieval model that is QGSA - DQP- based, and makes a feasible research.