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主题标引的目的是建立检索系统,使读者能从数量庞大、内容繁杂的文献中找到所需要的文献.在整个检索系统中,主题标引既是文献存入检索系统的依据,又是从检索系统中查找文献的依据.主题标引的主要步骤有主题分析、主题概念转换和主题词的确定.这里主要谈谈科技文献主题标引中的几个技术问题,作为前文(见本刊1987年第一期)的补充,以便提供作者写主题词时参考.
The purpose of thematic indexing is to establish a search system that enables readers to find the required documents from a large number of complicated documents.In the entire retrieval system, thematic indexing is not only the basis for document retrieval into the retrieval system, System to find the basis of the literature.The main steps of the subject indexing are thematic analysis, thematic conversion and thematic definition.We mainly talk about several technical issues in the indexing of the scientific and technological literature, as the preceding article First period) supplement, in order to provide the author to write thesaurus reference.