Patent ID: 6836772
Filing Date: 2004-12-28
Classification: G06F,Y10S

Abstract:
A key word deriving device comprising:a document data acquiring section for acquiring document data each having a parameter previously added thereto and for registering said document data including words and said parameter to a document table; a document data dividing section for dividing the acquired document data for each type of the parameter by distinguishing the types of parameters of the document data, and for generating a word list of words contained in the divided data and their statistical amounts; a word table registering section for calculating and registering, in a word-count table, the statistical amounts of the words in the divided data having the same type of the parameter added thereto by referring to the word list; an importance table registering section for calculating an importance of each word based on a ratio of the count value of a word in a corresponding parameter type to the number of documents in the parameter type, divided by the ratio of the count value of the word for other parameter types to the number of documents for the other parameter types, said count value of a word for a corresponding parameter type being obtained by referring to the word-count table, and for registering the importance of each word in an importance table; and a keyword deriving section for deriving a word having a higher importance as a key word by referring to the importance table.