List of all Containers PREFIX bibo: <http://purl.org/ontology/bibo/> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX sioc: <http://rdfs.org/sioc/ns#> SELECT * FROM <http://demo.openlinksw.com/Doc> WHERE { ?forum a sioc:Container . OPTIONAL { ?forum bibo:author ?author } . OPTIONAL { ?forum bibo:identifier ?identifier } . } 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)