Hello. While exploring Jena (v4.6.1)'s RDF-star functionality and features, I'm getting the following output:
@prefix calculus: <http://www.w3.org/community/planning/calculus/ontology#> . @prefix example: <http://example.org/#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . << example:predicate calculus:holdsFor _:b0 >> calculus:probability "0.95"^^xsd:double . [ rdf:first example:x ; rdf:rest ( example:y example:z ) ] . while expecting: @prefix calculus: <http://www.w3.org/community/planning/calculus/ontology#> . @prefix example: <http://example.org/#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . << example:predicate calculus:holdsFor ( example:x example:y example:z ) >> calculus:probability "0.95"^^xsd:double . To obtain the output, I'm utilizing the following source code: public static void foo(Model model) { model.setNsPrefix("calculus", "http://www.w3.org/community/planning/calculus/ontology#";); model.setNsPrefix("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#";); model.setNsPrefix("xsd", "http://www.w3.org/2001/XMLSchema#";); model.setNsPrefix("example", "http://example.org/#";); Resource predicate = model.createResource("http://example.org/#predicate";); Resource p1 = model.createResource("http://example.org/#x";); Resource p2 = model.createResource("http://example.org/#y";); Resource p3 = model.createResource("http://example.org/#z";); Property calculus_holdsFor = model.createProperty("http://www.w3.org/community/planning/calculus/ontology#holdsFor";); Property calculus_probability = model.createProperty("http://www.w3.org/community/planning/calculus/ontology#probability";); RDFList list = model.createList(p1, p2, p3); Statement s = model.createStatement(predicate, calculus_holdsFor, list); Resource quoted = model.createResource(s); //model.add(s); model.add(quoted, calculus_probability, model.createTypedLiteral(0.95)); } public static void main(String[] args) throws IOException { Model model = ModelFactory.createDefaultModel(); foo(model); RDFDataMgr.write(System.out, model, Lang.TURTLE); } Might this be a bug or issue with respect to list-handling in quoted RDF-star triples or with respect to serialization to Turtle-star? Thank you. Best regards, Adam Sobieski
