SELECT ?predicate (COUNT(*)AS ?frequency)
WHERE {?subject ?predicate ?object}
GROUP BY ?predicate
ORDER BY DESC(?frequency)
LIMIT 50
我想找到并订购最常见的谓词。我对自己定义的谓词频率感兴趣,但并不是所有这些内容都如下所示:
rdf:type
hashcode
sourceOntology
rdfs:subClassOf
rdf:first
rdf:next
...
我的谓词都没有出现。如何显示用户定义的谓词?