virtuoso-t +foreground +configfile path/to/virtuoso.ini
python
from rdflib import Graph, Namespace, Literal
from rdflib.namespace import RDF
g = Graph()
ex = Namespace("http://example.com/")
g.add((ex.subject1, RDF.type, ex.object1))
g.add((ex.subject2, RDF.type, ex.object2))
g.add((ex.subject3, RDF.type, ex.object3))
g.serialize(destination='triples.rdf', format='xml')
g.load('triples.rdf', format='xml')
query = """
PREFIX ex: <http://example.com/>
SELECT ?subject ?object WHERE {
?subject rdf:type ex:object1 .
?subject rdf:type ex:object2 .
?subject rdf:type ex:object3 .
?subject ?predicate ?object .
}
"""
results = g.query(query)
for row in results:
print(f"{row['subject']} - {row['object']}")
