MediaWikiREFExample3Dump of MediaWiki Users details PREFIX sioc: <http://rdfs.org/sioc/ns#> SELECT * FROM <http://demo.openlinksw.com/mw_v> WHERE { ?user a sioc:User . optional{ ?user sioc:id ?id}. optional{ ?user sioc:name ?name}. optional{ ?user sioc:email ?email}. optional{ ?user sioc:email_sha1 ?user_email_sha1}. } 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)