Hitachi, Ltd.

Yousuke Ushiroji

Katsumi Tada

Tadataka Matsubayashi

Natsuko Sugaya

Yasuhiko Inaba

Takuya Okamoto

Akihiko Yamaguchi

Retrieval conditions inputted from a plurality of users are registered. According to the retrieval conditions, a retrieval is conducted for a text inputted. As a result of the retrieval, similarity of the text is calculated for each retrieval condition. The text is delivered to users of which the retrieval condition satisfies the similarity.

Method of and an apparatus for retrieving and delivering documents and a recording media on which a program for retrieving and delivering documents are stored

A document retrieval system is provided which has a document display interface which is easy to recognize the important portions even if a document retrieved by using a query expression designated by a document or a long sentence is displayed. When a text is registered, predetermined character strings and location information which are extracted from the text are stored in a location information file. A weight of each character string is calculated by a predetermined method and is stored in a weight file. In retrieving a document, predetermined character strings are extracted from a designated query expression. A similarity is calculated between the query expression and texts in the database by using the location information and the weights acquired from the location file and the weight file. In displaying the document, character strings having the high weights are extracted from the character strings used for the retrieval. Then, the display format of a portion which contains the extracted character strings is changed to display the text.

Document retrieval method and system and computer readable storage medium

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Osaka, Japan

Yousuke Ushiroji