| 摘要 |
In a keyword management apparatus 1 for managing a relationship among a plurality of keywords used to search a file, a keyword database 16 stores a plurality of keywords and hierarchical relationship information by defining a hierarchical relationship among the keywords. A tree creation unit 11 creates a plurality of keyword trees by utilizing the hierarchical relationship information. A designation unit 12 designates a first keyword belonging to a first keyword tree by referring to the keyword database 16 . A search unit 13 searches for a second keyword, which corresponds to the first keyword and belongs to a second keyword tree, and searches for a keyword on a layer above the second keyword obtained on the basis of the hierarchical relationship information. This may be done by referring to a keyword database 16 . A display unit 14 displays the search unit's 13 search results.
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