Fix metadata query
@@ -5,10 +5,8 @@ PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT DISTINCT ?entity ?property ?value WHERE
{VALUES ?property
{dcterms:license
- dc:license
- dcterms:description
dc:description
- dcterms:title
dc:title}
- ?entity a owl:Ontology
- OPTIONAL {?entity ?property ?value}}
+ ?entity a owl:Ontology .
+ OPTIONAL { ?entity ?property ?value }
+ FILTER (!bound(?value))}
