文献分类的实质就是对文献载体所含的知识单元——特定的概念的划分过程。这种划分包括对知识单元的分析过程和组合过程,分析过程的结果是形成文献分类的体系;组合过程则是对分析过程所划分的概念的具体应用,因此,分析过程是区分文献的理论基础,本文拟着重在这方面谈谈认识。一般来说,对知识单元的认识,就形成 The essence of document classification is to divide the knowledge unit contained in the document carrier into a specific concept. This division includes the analysis process and the combination process of knowledge units, the result of the analysis process is the system that forms the document classification; the combination process is the concrete application of the concept divided by the analysis process, therefore, the analysis process is the theoretical basis for distinguishing the documents This article will focus on understanding in this respect. In general, knowledge of the unit of knowledge to form