%A Wu Sizhu, Qian Qing, Hu Tiejun, Li Danya, Li Junlian, Hong Na %T Contrast Analysis of Methods and Tools for Lemmatization %0 Journal Article %D 2012 %J Data Analysis and Knowledge Discovery %R 10.11925/infotech.1003-3513.2012.03.05 %P 27-34 %V 28 %N 3 %U {https://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/abstract/article_3533.shtml} %8 2012-03-25 %X Combining theory with practice, this paper compares the methods and tools for lemmatization in word normalization. It summarizes the categories of lemmatization methods and analyses their features and disadvantages. Then it separately compares seven tools from aspects as the principle, POS tagger, lexicon, programming language, language, spell checker.It takes experiments with the datasets from WordSimith Tools to evaluate five lemmatizers. By comparing the results, it finds that the Specialist NLP Tools has a better effect than others.This paper provides an assistance for the study in choosing the appropriate method and tool for lemmatization.