W3C Recommendation 21 March 2013This version: http://www.w3.org/TR/2013/REC-sparql11-overview-20130321/ Latest version: http://www.w3.org/TR/sparql11-overview/ Previous version:http://www.w3.org/TR/2012/PR-sparql11-overview-20121108/Editor:The W3C SPARQL Working Group, see Acknowledgements <public-rdf-dawg-comments@w3.org>Please refer to the errata for this document, which may include some normati