Details
Major Description
I downloaded knowledge from an RDF4J data store in triple format. I stored the content in a file called example.ttl.
When I try to load the file, the composite resources do not get generated, resulting in some triples not being added to the model.
The code I run is:
Model model = ModelFactory.createDefaultModel();
model.read("example.ttl");
The output is:
null inXSDDateTimeStamp "2020-05-21T06:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime" . null inXSDDateTimeStamp "2020-05-21T21:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime" . null year "2020^^http://www.w3.org/2001/XMLSchema#integer" . null second "0.0^^http://www.w3.org/2001/XMLSchema#decimal" . null month "5^^http://www.w3.org/2001/XMLSchema#integer" . null minute "51^^http://www.w3.org/2001/XMLSchema#integer" . null hour "10^^http://www.w3.org/2001/XMLSchema#integer" . null day "21^^http://www.w3.org/2001/XMLSchema#integer" . null inXSDDateTimeStamp "2020-05-21T10:51:00.000Z^^http://www.w3.org/2001/XMLSchema#dateTime" . null inDateTime deab4047bb2762830ec586ecdbb6ebf7 . sim timeslotDuration "60000^^http://www.w3.org/2001/XMLSchema#integer" . sim sunsetTime de28266990fc799c9dde46e9a902ff55 . sim sunriseTime ccdbc2858add8f74d995dffcdcec5a22 . sim iterations "1440^^http://www.w3.org/2001/XMLSchema#integer" . sim initialTime "2020-05-21T08:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime" . sim currentTime 1806f92a70aa91903b714f6ba5bdb68f . sim currentIteration "171^^http://www.w3.org/2001/XMLSchema#integer" .
Note the null subjects.
The code I used to generate the output is below:
Iterator<Statement> iterator = model.listStatements(); while (iterator.hasNext()) { Statement stmt = iterator.next(); Resource subject = stmt.getSubject(); Property predicate = stmt.getPredicate(); RDFNode object = stmt.getObject(); System.out.print(subject.getLocalName()); System.out.print(" " + predicate.getLocalName() + " "); if (object instanceof Resource) { System.out.print(object.toString()); } else { // object is a literal System.out.print(" \"" + object.toString() + "\""); } System.out.println(" ."); }