FOAF: * aimChatID * based_near * birthday * family_name * firstName * gender * homepage * icqChatID * maker * mbox * msnChatID * nick * phone * yahooChatID SIOC: * has_container * has_creator * id * link * topic vcard: * ADR * BDAY * CATEGORIES * EMAIL * FN * N * NICKNAME * UID PREFIX sioc: <http://rdfs.org/sioc/ns#> PREFIX sioct: <http://rdfs.org/sioc/types#> SELECT DISTINCT ?attribute WHERE { ?forum a sioct:AddressBook . ?forum sioc:container_of ?post . ?post ?attribute ?o } 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)