KEA: Practical Automatic Keyphrase Extraction

Details KEA: Practical Automatic Keyphrase Extraction KEA: Practical Automatic Keyphrase Extraction

1999-02-05

arxiv.org/abs/cs/9902007v1

Computer Science

Digital Libraries

9 pages

Scientific paper

Keyphrases provide semantic metadata that summarize and characterize documents. This paper 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 publicly available.

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