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| """Untill https://github.com/RDFLib/rdflib/pull/807 is merged and released.""" | |
| from rdflib import Graph, BNode, URIRef | |
| from six.moves.urllib.parse import urljoin | |
| """requirements.txt: | |
| rdflib>=4.2.2 | |
| """ | |
| def bNodeSkolemize(self, authority=None, basepath=None): | |
| """ Create a URIRef "skolem" representation of the BNode, in accordance | |
| with http://www.w3.org/TR/rdf11-concepts/#section-skolemization | |
| .. versionadded:: 4.0 | |
| """ | |
| rdflib_skolem_genid = "/.well-known/genid/rdflib/" | |
| if authority is None: | |
| authority = "http://rdlib.net/" | |
| if basepath is None: | |
| basepath = rdflib_skolem_genid | |
| skolem = "%s%s" % (basepath, str(self)) | |
| return URIRef(urljoin(authority, skolem)) | |
| def skolemize(self, new_graph=None, bnode=None, authority=None, basepath=None): | |
| def do_skolemize(bnode, t): | |
| (s, p, o) = t | |
| if s == bnode: | |
| s = bNodeSkolemize(s, authority=authority, basepath=basepath) | |
| if o == bnode: | |
| o = bNodeSkolemize(o, authority=authority, basepath=basepath) | |
| return (s, p, o) | |
| def do_skolemize2(t): | |
| (s, p, o) = t | |
| if isinstance(s, BNode): | |
| s = bNodeSkolemize(s, authority=authority, basepath=basepath) | |
| if isinstance(o, BNode): | |
| o = bNodeSkolemize(o, authority=authority, basepath=basepath) | |
| return (s, p, o) | |
| retval = Graph() if new_graph is None else new_graph | |
| if bnode is None: | |
| self._process_skolem_tuples(retval, do_skolemize2) | |
| elif isinstance(bnode, BNode): | |
| self._process_skolem_tuples( | |
| retval, lambda t: do_skolemize(bnode, t)) | |
| return retval | |
| inputUri = "file.ttl" | |
| graph = Graph() | |
| graph.parse(inputUri, format="ttl") | |
| skolemGraph = skolemize(graph, authority="http://ub.uni-leipzig.de", basepath="mobigames/") | |
| skolemGraph.serialize(destination="skolemized.ttl", format='ttl') |
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