METHOD AND DEVICE FOR NORMALIZING AND DEVELOPING DIFFERENT NOTATION, METHOD AND DEVICE FOR RETRIEVING DOCUMENT BY USING THE METHOD, AND PROGRAM RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To realize different notation development capable of preventing the occurrence of wasteful different notation development and retrieval leakage by performing the most proper different notation normalizing processing and different notation developing processing to the KATAKANA (Japanese square syllabary) string of different notation having variability in notation. SOLUTION: This method has a normalization part 122 for extracting the continuous KATAKANA string from a text to obtain normalized notation based on a normalization rule 123a and a different normalization developing part 126 for extracting the continuous KATAKANA string to develop it to the different notation of the normalized notation based on a different notation developing dictionary 127a, and has an entry word cost to which the rule 123a having conversion rules to the normalized notation registered therein or/and a different notation developing dictionary 127a having the different notation to be developed registered therein can be set optionally by each entry word constituting a dividing unit. Thus, the part 122 or/and the part 126 perform normalization processing or/and different notation developing processing to which morpheme analysis of a cost minimizing methods is applied.