{"action":"opened","issue":{"number":91,"created_at":"2011-10-19T01:18:22Z","pull_request":{"diff_url":null,"patch_url":null,"html_url":null},"body":"Originally filed by cuu...@gmail.com on 2009-11-13T12:27:08\n\nWhat steps will reproduce the problem?\n\r\n>>> from rdflib.graph import ConjunctiveGraph\r\n>>> from rdflib.term import URIRef\r\n>>> x = ConjunctiveGraph()\r\n>>> x.add((URIRef(\"http://a\"), URIRef(\"http://b\"), URIRef(\"http://c\")))\r\n>>> list(x.query(\"SELECT ?s  WHERE { ?s ?p ?o  } \"))\r\n[rdflib.term.URIRef('http://a')]\r\n>>> # Expect to get the same result with OPTIONAL:\r\n>>> list(x.query(\"SELECT ?s  WHERE { OPTIONAL { ?s ?p ?o }  } \"))\r\n[]\r\n\r\nWhat version of the product are you using? On what operating system?\n\r\nrdflib 2.4.2 and rdflib 2.5.0 (r1722)","comments":0,"title":"OPTIONAL doesn't work in SPARQL queries","updated_at":"2011-10-19T01:18:22Z","url":"https://api.github.com/repos/gjhiggins/rdflib/issues/91","id":1989565,"assignee":null,"milestone":null,"closed_at":null,"user":{"avatar_url":"https://secure.gravatar.com/avatar/918398787dc9e085672703644972e5e4?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","gravatar_id":"918398787dc9e085672703644972e5e4","url":"https://api.github.com/users/gjhiggins","id":16417,"login":"gjhiggins"},"html_url":"https://github.com/gjhiggins/rdflib/issues/91","labels":[],"state":"open"},"legacy":{"number":91,"action":"opened","issue":1989565}}