DrupalREFExample1Dump of all Drupal users PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX sioc: <http://rdfs.org/sioc/ns#> SELECT * WHERE { ?usr rdf:type sioc:User . OPTIONAL { ?usr sioc:name ?name}. OPTIONAL { ?usr sioc:email ?email}. } Sample Data (Live Query Results) View Query Results (via SPARQL Protocol URL) View Query Results (via iSPARQL Results URL) View Query Editor (via iSPARQL Visual Query Editor URL)