Since the Virtuoso version is updated recently, when I try to use the query below on the public DBpedai SPARQL endpoint. The result is empty.
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX dbo:<http://dbpedia.org/ontology/> PREFIX vrank:<http://purl.org/voc/vrank#> SELECT ?s ?v FROM <http://dbpedia.org> FROM <http://people.aifb.kit.edu/ath/#DBpedia_PageRank> WHERE { ?s rdf:type dbo:University. ?s vrank:hasRank/vrank:rankValue ?v. } ORDER BY DESC(?v) LIMIT 50
Thank you!
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