---+++Users Projects PREFIX rdf: PREFIX rdfs: PREFIX sioc: PREFIX foaf: PREFIX dc: SELECT * WHERE { ?usr rdf:type sioc:User. ?usr rdfs:account_of ?sr . optional {?sr foaf:openid ?openid }. optional {?sr foaf:nick?title}. } ---+++++Sample Data (Live Query Results) * View Query Results [[http://demo.openlinksw.com/sparql?default-graph-uri=&should-sponge=&query=PREFIX+rdf%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0D%0APREFIX+rdfs%3A+%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0D%0APREFIX+sioc%3A+++%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0D%0APREFIX+foaf%3A+%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0D%0APREFIX+dc%3A++%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%3E%0D%0ASELECT+*%0D%0AWHERE+%0D%0A++%7B+%3Fusr+rdf%3Atype+sioc%3AUser.%0D%0A++++%3Fusr+rdfs%3Aaccount_of+%3Fsr+.%0D%0A++++optional+%7B%3Fsr+foaf%3Aopenid+%3Fopenid+%7D.%0D%0A++++optional+%7B%3Fsr+foaf%3Anick%3Ftitle%7D.%0D%0A++%7D&format=text%2Fhtml&debug=on][(via SPARQL Protocol URL)]] * View Query Results [[http://demo.openlinksw.com/view/?format=application%2Frdf%2Bxml&maxrows=50&query=%0APREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0APREFIX%20rdfs%3A%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0APREFIX%20sioc%3A%20%20%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0APREFIX%20foaf%3A%20%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0APREFIX%20dc%3A%20%20%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%3E%0ASELECT%20*%0AWHERE%20%0A%20%20%7B%20%3Fusr%20rdf%3Atype%20sioc%3AUser.%0A%20%20%20%20%3Fusr%20rdfs%3Aaccount_of%20%3Fsr%20.%0A%20%20%20%20optional%20%7B%3Fsr%20foaf%3Aopenid%20%3Fopenid%20%7D.%0A%20%20%20%20optional%20%7B%3Fsr%20foaf%3Anick%3Ftitle%7D.%0A%20%20%7D&endpoint=/sparql&maxrows=50&default-graph-uri=][(via iSPARQL Results URL)]] * View Query Editor [[http://demo.openlinksw.com/isparql/?query=PREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0APREFIX%20rdfs%3A%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0APREFIX%20sioc%3A%20%20%20%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0APREFIX%20foaf%3A%20%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0APREFIX%20dc%3A%20%20%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%3E%0ASELECT%20*%0AWHERE%20%0A%20%20%7B%20%3Fusr%20rdf%3Atype%20sioc%3AUser.%0A%20%20%20%20%3Fusr%20rdfs%3Aaccount_of%20%3Fsr%20.%0A%20%20%20%20optional%20%7B%3Fsr%20foaf%3Aopenid%20%3Fopenid%20%7D.%0A%20%20%20%20optional%20%7B%3Fsr%20foaf%3Anick%3Ftitle%7D.%0A%20%20%7D&endpoint=/sparql&maxrows=50&default-graph-uri=][(via iSPARQL Visual Query Editor URL)]]