| 摘要 |
An information retrieval system includes a a database which holds information items arranged in a hierarchical data structure. An information retrieval device outputs a search result from the database in response to a goodness of fit computed for each of the information items to search criteria. An input unit inputs hierarchy information indicating a hierarchy to which priority is given for outputting of a corresponding search result. A goodness-of-fit change unit assigns a bias value to a goodness of fit computed for each of information items from among the information items held in the database, which are arranged at the hierarchy indicated by the hierarchy information inputted by the input unit, to change the goodness of fit.
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