On 22/08/15 12:43, kumar rohit wrote:
After imports all the code in jena is here.
No data.
I *strongly* suggest you follow the advice in
http://stackoverflow.com/help/mcve
when sending questions.
Minimal
Complete
Verifiable
Andy
public class famtree {
static final String inputfile
=("C://Users//km//Desktop//Project//protege//Module.owl");
public static void main(String[] args) {
// TODO Auto-generated method stub
OntDocumentManager mgr=new OntDocumentManager();
OntModelSpec spec=new OntModelSpec(OntModelSpec.OWL_DL_MEM);
spec.setDocumentManager(mgr);
OntModel m = ModelFactory.createOntologyModel(spec,null);
//use filemanager to open ontology from file system
InputStream in=FileManager.get().open(inputfile);
if (in==null)
{
throw new IllegalArgumentException("File" + inputfile + "not found");
}
m.read(in,"");
String querystring="PREFIX rr:<
http://www.semanticweb.org/kumar/ontologies/2015/5/untitled-ontology-22#>"
+ "SELECT ?var \n "
+ "WHERE {"
+ " ?var rr:studies rr:Course2 " + " }";
Query query=QueryFactory.create(querystring);
QueryExecution qe = QueryExecutionFactory.create(query, m);
try {
ResultSet results = qe.execSelect();
ResultSetFormatter.out(System.out, results, query);
//System.out.println(querystring);
}
finally {
qe.close();
}
On Sat, Aug 22, 2015 at 12:35 PM, Andy Seaborne <[email protected]> wrote:
Show the data.
Show how you created the model.
http://stackoverflow.com/help/mcve
Andy
On 22/08/15 12:15, kumar rohit wrote:
Student studies course, this is the statement. Individuals are Student1,
Student2, Student3(subjects) and Course2(object).
Student1, Student2, Student3 studies Course2 where some other students
studies course1.
On Sat, Aug 22, 2015 at 12:09 PM, Chris Dollin <
[email protected]
wrote:
On 08/22/2015 11:47 AM, kumar rohit wrote:
This code only displays "Student1" where it suppose to display Student1,
student2 and student 3 as i made the ontology in Protege so.. In protege
it
displays all three but here in Jena its output is:
| var |
===============
| rr:Student1 |
code is below
Show the model and how you construct it.
__________________________________________________________________
String querystring="PREFIX rr:<
http://www.semanticweb.org/asadali/ontologies/2015/5/untitled-ontology-22#
"
+ "SELECT ?var \n "
+ "WHERE {"
+ " ?var rr:studies rr:Course2 " + " }";
Query query=QueryFactory.create(querystring);
QueryExecution qe = QueryExecutionFactory.create(query, m);
try {
ResultSet results = qe.execSelect();
ResultSetFormatter.out(System.out, results, query);
//System.out.println(querystring);
}
Chris
