Document searching device, document searching method, program, and recording medium

摘要

In a document searching device that searches documents from a set of predetermined documents in response to an input search condition, a seed document acquiring unit is operable to acquire seed documents based on information that is different from the input search condition. A word extraction unit is operable to extract a set of words that are associated with the input search condition, from the seed documents acquired by the seed document acquiring unit. A search unit is operable to search documents from the set of predetermined documents based on the input search condition and the set of words extracted by the word extraction unit.