FIELD: physics.
SUBSTANCE: invention relates to a method of extracting key phrases from text data. Method comprises extracting candidates into key phrases by forming and converting noun phrases, at the second stage, the extracted text data are normalized, including the key words reduction to the normal word form (case, number change), the case correction and the syntax parser errors processing, at the third stage, the candidate phrases are filtered, at the fourth stage, key phrases are selected, at the fifth stage, the list of key phrases is finalized on the basis of evaluation of similarity of vectors of key phrases and phrases-candidates for key phrases.
EFFECT: high relevance of searching for text documents.
3 cl
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