On 19/02/14 11:54, Guilherme Maranhão wrote:
Dave,
I've removed line 2 as you've suggested, but stage3Hypertension continues
null.
Isn't it the way I am creating the modelMem object?
ModelMaker modelMaker = ModelFactory.createFileModelMaker(/User/guilherme
/ontology/vitalSign.owl);
Model modeltmp = modelMaker.createDefaultModel();
modelMem = ModelFactory.createOntologyModel(OntModelSpec.
OWL_MEM_MICRO_RULE_INF, modeltmp);
I don't think modelMaker.createDefaultModel() loads any data, just
creates an empty model. But I never use it so can't be sure.
Try simply:
Model model = RDFDataMgr.loadModel("your-file-name") ;
[Hope that's the right syntax, I'm still too used to FileManager.]
Dave
On Wed, Feb 19, 2014 at 5:38 AM, Dave Reynolds <[email protected]>wrote:
On 19/02/14 03:20, Guilherme Maranhão wrote:
Hello guys,
Those are the steps I am using to instantiate an OntClass object:
// modelMem is an OntModel object.
1 - Reasoner reasoner = ReasonerRegistry.getOWLReasoner();
2 - reasoner = reasoner.bindSchema(modelMem);
3 - OntModelSpec ontModelSpec = OntModelSpec.OWL_DL_MEM_RULE_INF;
4 - ontModelSpec.setReasoner(reasoner);
5 - OntModel ontModel = ModelFactory.createOntologyModel(ontModelSpec,
modelMem);
6 - OntClass stage3Hypertension = ontModel.getOntClass("
http://www.semanticweb.org/ontologies/2013/1/Ontology1361391792831.owl#
Stage3Hypertension
");
This is not your underlying problem but you have bound modelMem in twice -
you have bound it to the reasoner and then applied that back to the same
model. It would be better to just have:
OntModelSpec ontModelSpec = OntModelSpec.OWL_DL_MEM_RULE_INF;
OntModel ontModel = ModelFactory.createOntologyModel(ontModelSpec,
modelMem);
Though in fact I would recommend OWL_MEM_MICRO_RULE_INF as the best
default.
After line 2, the console prompt shows a lot of warning messages, like
this:
Fev 19, 2014 12:15:56 AM
org.mindswap.pellet.jena.graph.query.GraphQueryHandler findTriple
Warning: No query handler found for
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
Those are messages from Pellet. Your above code does not include Pellet so
either this isn't the code you are running or your "modelMem" in the above
is actually Pellet-backed model.
If the latter then you have a rule reasoner running over a rule reasoner
running over Pellet. Don't know why that would cause outright failures but
certainly not a useful thing to do.
To get help with Pellet you would need to ask the Pellet folks, Pellet is
not part of Jena.
Dave
