As one of the two information retrieval languages language , system of subject heading, descriptor indexing.

主题法作为两种主要的情报检索语言之一, 其功用在传统的文献检索中已经得到了充分的体现.

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Thirdly system of subject guider. Finally , optimizing the resources allocation and regrouping of subject.

四是要合理配置学科建设资源, 搞好优化组合的学科建设思路.

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