| 摘要 |
PROBLEM TO BE SOLVED: To support the revision of a classification system so as to be a reasonable classification system while maintaining consistency as a whole.SOLUTION: A viewpoint common field retrieval means 2 extracts at least two fields equipped with categories from a common viewpoint. A hypothesis setting means 5 sets a hypothesis that a category existing in only a portion of extracted fields 3 and 4 is defined as an addition object category, and that the addition object category is added to the other field. When the addition object category is added according to the hypothesis, a hypothesis verification means 7 detects addition category adaptation information which is to belong to the addition object category by unit period. Furthermore, when the detected addition category adaptation information is inclined to increase, the hypothesis verification means 7 determines that the hypothesis is appropriate, Then, the hypothesis verification means 7 outputs the hypothesis determined to be appropriate as a revision plan 8. |
