Keyword outputting apparatus, keyword outputting method, and keyword outputting computer program product

摘要

A keyword outputting apparatus includes a document receiving unit (11) that receives documents in a specific time period. A keywords analyzing unit (12) analyzes the documents for possible keywords. A keyword extracting unit (13) calculates a score for each keyword and extracts the keywords in order of the score. A keyword-structure generating unit (14) generates a keyword structure by classifying and stratifying each extracted keyword. A keyword outputting unit (17) outputs the keywords in descending order of the score based on the keyword structure.