| 摘要 |
This index generation device is provided with: an index generation unit which uses the degree of similarity between data to generate an index including a lower node, and an upper node that includes an entry which has a link relation with the lower node and which indicates representative data having a degree of similarity with data indicated in the entry of said lower node that is greater than or equal to a similarity degree threshold value assigned to said link relation; and a threshold value determination unit which determines a default similarity degree threshold value and an adjustment value for each link relation between an upper node and a lower node and determines the similarity degree threshold to be assigned to each link relation by subtracting the adjustment value from the default similarity degree threshold value. |
