%A Bai Haiyan, Wang Li, Liang Bing %T UMLS and Its Application in Field of Intelligent Retrieval %0 Journal Article %D 2012 %J Data Analysis and Knowledge Discovery %R 10.11925/infotech.1003-3513.2012.04.01 %P 1-9 %V 28 %N 4 %U {https://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/abstract/article_3544.shtml} %8 2012-04-25 %X This paper mainly investigates UMLS's composition and characteristics, emphasizes on application cases of UMLS in field of intelligent and semantic retrieval, and analyses the scene designs, technology realization and application effects of these cases, in order to provide references for design and development of intelligent retrieval system based on integrated knowledge organization systems. The application of UMLS in field of intelligence and semantic retrieval mainly includes: (Ⅰ)query expansion, such as synonym expansion, hierarchical structure expansion and phrase segmentation expansion; (Ⅱ)semantic retrieval, based on concepts and relationships between concepts;(Ⅲ)question-answering search, including question analysis, document retrieval, sentence selection and semantic clustering.