Bookmarks Data Space PREFIX sioc: <http://rdfs.org/sioc/ns#> PREFIX sioct: <http://rdfs.org/sioc/types#> PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT DISTINCT ?fname, ?phone, ?post WHERE { ?forum a sioct:BookmarkFolder . ?forum sioc:container_of ?post. optional { ?post foaf:maker ?maker }. optional { ?maker foaf:firstName ?fname } . optional { ?maker foaf:phone ?phone } . } Sample Data (Live Query Results) Click Here for a live SPARQL Query (via SPARQL Protocol) against a collection of published bookmarks.