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from rdflib.URIRef import URIRef
from rdflib.Literal import Literal
from rdflib.BNode import BNode
from rdflib.Namespace import Namespace
from rdflib.constants import TYPE
# Import RDFLib's default TripleStore implementation.
from rdflib.TripleStore import TripleStore
# Create a namespace object for the Friend of a friend namespace.
FOAF = Namespace("http://xmlns.com/foaf/0.1/")
store = TripleStore()
store.prefix_mapping("dc", "http://http://purl.org/dc/elements/1.1/")
store.prefix_mapping("foaf", "http://xmlns.com/foaf/0.1/")
# Create an identifier to use as the subject for Donna.
donna = BNode()
from rdflib.constants import DATATYPE
# Add triples using store's add method.
store.add((donna, TYPE, FOAF["Person"]))
store.add((donna, FOAF["nick"], Literal("donna")))
store.add((donna, FOAF["name"], Literal("Donna Fales")))
# Iterate over triples in store and print them out.
print "--- printing raw triples ---"
for s, p, o in store:
print s, p, o
# For each foaf:Person in the store print out its mbox property.
print "--- printing mboxes ---"
for person in store.subjects(TYPE, FOAF["Person"]):
for mbox in store.objects(person, FOAF["mbox"]):
print mbox
# Serialize the store as RDF/XML to the file foaf.rdf.
store.save("foaf.rdf")
# Let's show off the serializers
print "RDF Serializations:"
# Serialize as XML
print "--- start: rdf-xml ---"
print store.serialize(format="pretty-xml")
print "--- end: rdf-xml ---\n"
# Serialize as NTriples
print "--- start: ntriples ---"
print store.serialize(format="nt")
print "--- end: ntriples ---\n"
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