Tracking Preference Expression (DNT) publication history Date Status 17 January 2019 Retired 19 October 2017 Candidate Recommendation Snapshot 20 August 2015 Candidate Recommendation Snapshot 24 April 2014 Last Call Working Draft 28 January 2014 Working Draft 12 September 2013 Working Draft 30 April 2013 Working Draft 2 October 2012 Working Draft 13 March 2012 Working Draft 14 November 2011 Working Draft