A method is provided for digesting the content of hierarchically related information. The method, which obtains relatively short overviews, selects a proportion of representative nodes and then extracts and organizes one or more sentences from the text associated with each selected node. For text trees...http://www.google.com.hk/patents/US7280957?utm_source=gb-gplus-share專利 US7280957 - Method and apparatus for generating overview information for hierarchically related information
