中文摘要：

把信息单元视为文献单元和知识元之间的桥梁和纽带，以文献单元间的参考文献链接和知识元名（或与知识元相关的文字）到知识元的知识元链接为研究对象，重点分析这两种链接的建立过程、建立规则以及技术难点。认为从理论上研究知识链接的建立规则对知识链接系统和知识服务系统的开发大有裨益。

英文摘要：

This paper views information unit as a bridge and link between document unit and knowledge unit, takes reference linking between document units and knowledge linking between document unit and knowledge unit as research objects, analyses their setting process, setting rules and technology problems. This theoretic discussion on linking rules for setting knowledge linking is helpful to the development of linking system and knowledge service system.