Jeen Broekstra; Dave Beckett. <a href="http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115"><cite>SPARQL Query Results XML Format.</cite></a> 15 January 2008. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115">http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115</a>