Patent ID: 8443008

Claim:
A cooccurrence dictionary creating system comprising: a data processing unit configured to include a language analyzing section which subjects a text to a morpheme analysis, a clause specification, and a modification relationship analysis between clauses, a cooccurrence relationship collecting section which collects cooccurrences of nouns in each clause of the text, modification relationships of nouns and declinable words, and modification relationships between declinable words as cooccurrence relationships, a cooccurrence score calculating section which calculates a cooccurrence score of the cooccurrence relationship based on a frequency of the collected cooccurrence relationship; and a storage unit configured to include a cooccurrence dictionary storage section which stores a cooccurrence dictionary in which a correspondence between the calculated cooccurrence score and the cooccurrence relationship is described, wherein the cooccurrence score calculating section estimates as a cooccurrence score a cooccurrence ratio of two arbitrary words constituting the collected cooccurrence relationship based on the cooccurrence relationship collected by the cooccurrence relationship collecting section and the frequency thereof.