def read_graph(*rdfs):
"""
Read multiple RDF-files and combine them into one graph.
"""
g = rdflib.Graph()
namespaces.init_bindings(g)
for rdf in rdfs:
log.info("Reading graph %s", rdf)
g.parse(rdf)
log.info("Read %d tuples", len(g))
return g
def write_resource(graph, dataset_uri, out, include_backlinks=True,
format='xml'):
"""
Writes a single dataset
"""
subgraph = Graph()
namespaces.init_bindings(subgraph)
for p, o in graph.predicate_objects(dataset_uri):
subgraph.add((dataset_uri, p, o))
if include_backlinks:
for s, p in graph.subject_predicates(dateset_uri):
subgraph.add((s, p, dataset_uri))
subgraph.serialize(destination=out, format=format)
def create_subgraph(graph, item):
g = rdflib.Graph()
namespaces.init_bindings(g)
for triple in graph.triples((item, None, None)):
g.add(triple)
for triple in graph.triples((URIRef(item + '#facebook'), None, None)):
g.add(triple)
for triple in graph.triples((URIRef(item + '#twitter'), None, None)):
g.add(triple)
for triple in graph.triples((None, None, item)):
g.add(triple)
return g
def main(output):
db.init_store("data/db")
zoochat = db.get_zoochat_graph()
print "Loaded zoochat graph", zoochat, "containing", len(zoochat), "triples"
zoowizard = Graph(identifier=namespaces.ZOO_GRAPH)
namespaces.init_bindings(zoowizard)
create_resources(zoochat, zoowizard)
copy_simple_facts(zoochat, zoowizard)
derive_dbpedia(zoochat, zoowizard)
# geonames = db.get_geonames_graph()
# print "Loaded geonames graph", geonames, "containing", len(geonames), "triples"
# find_country_references(zoochat, zoowizard, geonames)
zoowizard.serialize(destination=output)
def _get_graph(uri):
if store is None:
raise RuntimeError("Don't forget to call init_graph ")
graph = Graph(store=store, identifier=URIRef(uri))
namespaces.init_bindings(graph)
return graph
def init_graph():
g = rdflib.Graph()
namespaces.init_bindings(g)
return g
