An information processing apparatus searches for documents with access rights created for them. A file information obtaining section obtains predetermined information from a file. A right information obtaining section obtains right information indicating a user who can access a file. An index storing...http://www.google.com.tw/patents/US6985948?utm_source=gb-gplus-share專利 US6985948 - User's right information and keywords input based search query generating means method and apparatus for searching a file
