The present invention relates to a method and apparatus for generating responses to queries to a document retrieval system. The system responds to a specific request for information by locating and ranking portions of text that may contain the information sought. It locates small relevant passages of...http://www.google.com.hk/patents/US6282538?utm_source=gb-gplus-share專利 US6282538 - Method and apparatus for generating query responses in a computer-based document retrieval system
