MORPHEME ANALYSIS DEVICE, MORPHEME ANALYSIS METHOD, MORPHEME ANALYSIS PROGRAM, AND RECORDING MEDIUM WITH COMPUTER PROGRAM RECORDED THEREON

摘要

PROBLEM TO BE SOLVED: To provide a morpheme analysis device for acquiring a proper morpheme analysis result even when any undefined word exists.

SOLUTION: This morpheme analysis device is provided with a retrieval result requesting means for, when any undefined word which is not stored in a word dictionary storage means 140 exists in a character string, requesting the retrieval result to an internal or external retrieval device 50 on the basis of the undefined word as retrieval conditions; a document vector calculation means for calculating the whole or a portion of the retrieval result as one document; a similarity calculation means for calculating the similarity of the document vector of the undefined word with the document vector of a known word; a similar word specification means for specifying a similar word as a known word corresponding to the document vector whose similarity is high; and an attribute application means for associating a part of speech and costs of the similar word with the undefined word. The division means is configured to divide the input character string into units by using the part of speech and costs associated with the undefined word by the undefined word attribute application means.

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