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主题分布研究的关键是如何确定文献的主题。根据确定主题的方法可将主题分为自建主题和替代主题。国外LIS主题分布研究以自建主题分布研究为主,替代主题分布研究为辅。国外LIS自建主题分布研究分探索期、繁荣期、新探索期三个阶段。国外LIS替代主题分布研究简要概括为6种类型。主题确定的方法分别为分类法、主题词表、参照分类法和主题词表、关键词、共词分析和特定模型。最后指出我国LIS需要加强自建主题分布研究。
The key to the topic distribution research is how to determine the topic of the literature. According to determine the theme of the method can be divided into self-built themes and alternative themes. The research on the distribution of LIS topics in foreign countries mainly focuses on the distribution of self-built topics, supplemented by the research on the distribution of alternative topics. The research on the distribution of self-built LIS in foreign countries is divided into three stages: exploration period, prosperous period and new exploration period. The research on the distribution of alternative LIS in foreign countries is briefly summarized as six types. The methods of topic identification are taxonomy, thesauri, reference taxonomy and thesaurus, keyword, co-word analysis and specific model. Finally, it points out that LIS in our country needs to strengthen the research on the distribution of self-built topics.