KEA: Practical Automated Keyphrase Extraction

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Author(s): Ian H. Witten (University of Waikato, New Zealand), Gordon W. Paynter (University of Waikato, New Zealand), Eibe Frank (University of Waikato, New Zealand), Carl Gutwin (University of Saskatchewan, Canada)and Craig G. Nevill-Manning (Google Inc., USA)
Copyright: 2005
Pages: 24
Source title: Design and Usability of Digital Libraries: Case Studies in the Asia Pacific
Source Author(s)/Editor(s): Yin-Leng Theng (Nanyang Technological University, Singapore)and Schubert Foo (Nanyang Technological University, Singapore)
DOI: 10.4018/978-1-59140-441-5.ch008

Keywords: Digital Libraries / Information Science Reference / Library & Information Science / Library Science

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Abstract

Keyphrases provide semantic metadata that summarize and characterize documents. This chapter describes Kea, an algorithm for automatically extracting keyphrases from text. Kea identifies candidate keyphrases using lexical methods, calculates feature values for each candidate, and uses a machine-learning algorithm to predict which candidates are good keyphrases. The machine-learning scheme first builds a prediction model using training documents with known keyphrases, and then uses the model to find keyphrases in new documents. We use a large test corpus to evaluate Kea’s effectiveness in terms of how many author-assigned keyphrases are correctly identified. The system is simple, robust, and available under the GNU General Public License; the chapter gives instructions for use.

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