Knowledge unit is the basic unit for the knowledge linking, knowledge linking is the basis of the knowledge management and knowledge service.Knowledge linking based on knowledge unit can link with related knowledge resources and con-stitute a knowledge network.This article discusses the knowledge linking principle based on knowledge unit from the link elements, link methods and link models.Besides, the article analyzes its application in the knowledge management activities.%知识单元是知识链接的基本单位,知识链接是知识管理与知识服务的基础,基于知识单元的知识链接能把具有关联关系的知识资源链接构成知识网络。从知识链接要素、知识链接方式、知识链接模型三个方面对基于知识单元的知识链接原理进行了探讨,并分析了其在知识管理和知识服务中的应用。
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