The present invention visualizes the contents of a plurality of documents without a lack of the listing property. Two document units are extracted from a document database and relevance degrees between individual elements of a group of the document units are calculated. The results are displayed on a...http://www.google.com.tw/patents/US7047255?utm_source=gb-gplus-share專利 US7047255 - Document information display system and method, and document search method