Ercan, G.Cicekli, I.2016-02-082016-02-082007-110306-4573http://hdl.handle.net/11693/23343Keywords can be considered as condensed versions of documents and short forms of their summaries. In this paper, the problem of automatic extraction of keywords from documents is treated as a supervised learning task. A lexical chain holds a set of semantically related words of a text and it can be said that a lexical chain represents the semantic content of a portion of the text. Although lexical chains have been extensively used in text summarization, their usage for keyword extraction problem has not been fully investigated. In this paper, a keyword extraction technique that uses lexical chains is described, and encouraging results are obtained. © 2007 Elsevier Ltd. All rights reserved.EnglishKeyword extractionLexical chainsMachine learningNatural language processingClassification (of information)Learning systemsNatural language processing systemsSemanticsText processingArticle10.1016/j.ipm.2007.01.015