【作者】 钱防震； 杜小勇；

【机构】 中国人民大学数据与知识工程研究所；

【摘要】 <正>1.引言数字图书馆的建设正从资源主导型向服务主导型转换。在资源主导型阶段,资源数字化工作取得了大量成果,各类数字资源数据库和应用系统不断开发出来。各数字图书馆在建设本单位数据库资源的同时,也购买了大量其它数据库资源。由于在资源建设中没有统一协调,各数据库提供商采用的开发方更多还原

【Abstract】 Great achievement has been made in digital resource construction of digital library,and lots of digital resources are used to serve users.Here heterogeneity is one of the main challenges faced by digital libraries.Too often documents are stored in different formats,collections are searched with disparate query languages,search services are accessed with incompatible protocols,intellectual property protection and access schemes are diverse,and retrieved information is returned using dissimilar representations and ranked in inconsistent ways.It is necessary to integrate these resources so that users can search what they need in a union interface.This paper focuses on explicating the framework of resource integration and union search in DLPers and makes further studies on current performance of this system in details.更多还原