Service Modeling Language, Version 1.1 publication history Date Status 12 May 2009 Recommendation 12 February 2009 Proposed Recommendation 25 November 2008 Candidate Recommendation Snapshot 12 September 2008 Last Call Working Draft 3 March 2008 Last Call Working Draft 14 January 2008 Working Draft 26 September 2007 Working Draft 6 August 2007 Working Draft