I am using rdflib, to query series of rdf files in which I know that the names have a language tag (when I query in a sparql endpoint), this is a snapshot of my data:
but when I parse the rdf file in python and extract the 'name' value I only get "Josephus" without the language tag.
I can get the tag separately with something like:
bind(lang(?name) as ?lan)
but that doesn't. I need to have the name and its tag when I serialize my graph.
Any suggestions what might cause this lose of information and how I can have my names with their language tags?
It's quite a simple query. Here is my full script:
import unicodedata
from rdflib import Namespace, URIRef, Graph , Literal , OWL, RDFS , RDF
from SPARQLWrapper import SPARQLWrapper2, XML , JSON , TURTLE
import os
sparql = SPARQLWrapper2("http://dbpedia.org/sparql")
os.chdir('...\Desktop')
jl = Namespace("http://data.judaicalink.org/ontology/")
foaf = Namespace("http://xmlns.com/foaf/0.1/")
graph = Graph()
spar= ("""
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX dbpedia: <http://dbpedia.org/resource/>
SELECT ?occ ?x ?name ?same
where {
<http://dbpedia.org/resource/Category:Jewish_historians> rdfs:label ?occ.
?x dct:subject <http://dbpedia.org/resource/Category:Jewish_historians>.
?x rdfs:label ?name.
?x owl:sameAs ?same.
}
""")
sparql.setQuery(spar)
sparql.setReturnFormat(TURTLE)
results = sparql.query().convert()
graph.bind('jl', jl)
graph.bind('foaf',foaf)
if (u"x",u"name",u"occ",u"same") in results:
bindings = results[u"x",u"name",u"occ",u"same"]
for b in bindings:
graph.add( (URIRef(b[u"x"].value), RDF.type , foaf.Person ) )
graph.add( (URIRef(b[u"x"].value), jl.hasLabel, Literal(b[u"name"].value) ) )
graph.serialize(destination= 'output.rdf' , format="turtle")
