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1文献标引的目的为了迅速有效地检索所需的文献,人们建立了文献检索系统。无论是手工检索或是计算机检索,其中存贮的文献都必须具备索引项(Index Term),使原来散乱的文献有序化,形成检索机制,以便存人和检出。索引项可以是文献的著者、文献名、分类号、主题词、序号等。其中主题索引项以文字作检索标识,它表达概念直接、准确、灵活,可随时增补新的检索标识,以反映新学科的发展,具有动态特点,更适于计算机自动标引文献和
1 The purpose of the literature index In order to quickly and efficiently retrieve the required literature, people established a document retrieval system. Whether manual or computerized retrieval, the stored documents must have an index term (Index Term), so that the original scattered documents ordered to form a search mechanism for depositors and detection. Index items can be the author of the literature, literature name, classification number, keywords, serial number and so on. Among them, thematic index items are indexed by words, which express the concept directly, accurately and flexibly, and can be supplemented with new search labels at any time to reflect the development of new disciplines, with dynamic characteristics, and more suitable for computer automatic indexing documents and