W3C Incubator Group Report 28 June 2011 This Version: http://www.w3.org/2005/Incubator/ssn/XGR-ssn-20110628/ Latest Published Version: http://www.w3.org/2005/Incubator/ssn/XGR-ssn/ Editors Laurent Lefort, CSIRO, Australia (Chair) Cory Henson, Wright State University, USA Kerry Taylor, CSIRO, Australia (Chair) Authors Payam Barnaghi, University of Surrey, UK (W3C Invited Expert) Michael Compton, CS