r an initial set of documentsUS9002867Dec 30, 2010Apr 7, 2015Google Inc.Modifying ranking data based on document changesUS9009146May 21, 2012Apr 14, 2015Google Inc.Ranking search results based on similar queriesUS20010004737 *Dec 15, 2000Jun 21, 2001Sun Microsystems, Inc.System and method including a merging driver for accessing multiple data sourcesUS20130198857 *Jan 25, 2013Aug 1, 2013Internatio