Open knoan opened 9 years ago
The following query unexpectedly returns an empty result set on the http://dbpedia.org/sparql endpoint (Virtuoso 7.20).
prefix dbr: <http://dbpedia.org/resource/> select ?a ?i where { values ?a { dbr:Fiat_500 dbr:Smart_Fortwo } optional { ?a <http://schema.org/image> ?i } }
The query breaks with a pattern like
optional { ?a <http://schema.org/image> ?i }
which doesn't match any triples.
It works as expected with a a matching pattern like:
optional { ?a <http://dbpedia.org/ontology/thumbnail> ?i }
This issue has been reported to development to look into ...
The following query unexpectedly returns an empty result set on the http://dbpedia.org/sparql endpoint (Virtuoso 7.20).
The query breaks with a pattern like
which doesn't match any triples.
It works as expected with a a matching pattern like: