the local file uploaded on stardog:
@prefix dbo: <http://dbpedia.org/ontology/> .
@prefix dbr: <http://dbpedia.org/resource/> .
dbr:United_States dbo:leader dbr:John_Roberts ,
dbr:Joe_Biden ,
dbr:Barack_Obama ,
dbr:Paul_Ryan .
1.query using the local file:
PREFIX dbr: <http://dbpedia.org/resource/>
PREFIX db: <http://dbpedia.org/>
PREFIX dbo: <http://dbpedia.org/ontology/>
SELECT ?person ?o
FROM <http://example.com/leaders.ttl>
WHERE{
dbr:United_States dbo:leader ?person .
SERVICE <http://dbpedia.org/sparql> { ?person dbo:abstract ?o .}
}
2.Same query using only dbpedia will give results:
PREFIX dbr: <http://dbpedia.org/resource/>
PREFIX db: <http://dbpedia.org/>
PREFIX dbo: <http://dbpedia.org/ontology/>
SELECT ?person ?o
FROM <http://example.com/leaders.ttl>
WHERE{
#dbr:United_States dbo:leader ?person .
SERVICE <http://dbpedia.org/sparql> { dbr:United_States dbo:leader ?person. ?person dbo:abstract ?o.}
}
Using the second query will result in a colum with the leaders and a column of abstract of the leaders in all languages available from dbpedia. Why does the first query where I use the local rdf file not work? The select query on the local file with dbr:United_States dbo:leader ?person . returns exactly the same column with the same leaders as running it directly on the dbpedia endpoint: dbpedia:John_Roberts, dbpedia:Joe_Biden, dbpedia:Barack_Obama, dbpedia:Paul_Ryan.
Why does the first query give no results?
