Javed,
This *still* doesn't show your data, *still" isn't plain text so we
can't check what code you actually have and *still* isn't a complete
example.
As one last attempt to help you, here's a version of the sample code I
showed before which includes your second rule, which is working just fine.
#### code
OntModel model = ModelFactory.createOntologyModel(
OntModelSpec.OWL_MEM );
String ns = "http://www.semanticweb.org#";;
OntClass Student = model.createClass(ns + "Student");
OntClass GoodStudent = model.createClass(ns + "GoodStudent");
OntClass WorstStudent = model.createClass(ns + "WorstStudent");
Property prop = model.getProperty(ns, "GPA");
Individual indiv = Student.createIndividual(ns + "s1");
indiv.addLiteral(prop, 3);
Individual indiv2 = Student.createIndividual(ns + "s2");
indiv2.addLiteral(prop, 1);
String rules = "[rule1:(?x
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#Student) "
+ "( ?x http://www.semanticweb.org#GPA ?marks )"
+ "greaterThan(?marks, 2) "
+ " -> (?x
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#GoodStudent )]"
+ "[rule2:(?x
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#Student) "
+ "( ?x http://www.semanticweb.org#GPA ?marks )"
+ "lessThan(?marks, 2) "
+ " -> (?x
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#WorstStudent )]";
Reasoner reasoner2 = new
GenericRuleReasoner(Rule.parseRules(rules));
InfModel inf = ModelFactory.createInfModel(reasoner2, model);
for (Iterator i = inf.listResourcesWithProperty(RDF.type,
GoodStudent); i.hasNext();) {
System.out.println("Good student: " + i.next());
}
for (Iterator i = inf.listResourcesWithProperty(RDF.type,
WorstStudent); i.hasNext();) {
System.out.println("Worst student: " + i.next());
}
#### Output
Good student: http://www.semanticweb.org#s1
Worst student: http://www.semanticweb.org#s2
Note that a student with a grade of exactly 2 will trigger neither rule,
that may or may not be what you want.
Dave
On 24/09/16 19:55, javed khan wrote:
This is the code where the first rules works and the second does not.
String rule = "[rule1:(?x http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org/#Student) "
+ "( ?x http://www.semanticweb.org#GPA
?marks )"
+ "greaterThan(?marks, 2) "
+ " -> (?x http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#GoodStudent
)]";
* String rule2 = "[rule2:(?y
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>*
*http://www.semanticweb.org#Student <http://www.semanticweb.org#Student> )
"*
* + "( ?y http://www.semanticweb.org#GPA
<http://www.semanticweb.org#GPA>*
* ?marks )"*
* + "lessThan(?marks, 2) "*
* + " -> (?y
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>*
* http://www.semanticweb.org#WorstStudent
<http://www.semanticweb.org#WorstStudent>*
* )]";*
"SELECT * " +
" WHERE { ?x rdf:type std:GoodStudent . ?y rdf:type
std:WorstStudent }";
Reasoner reasoner2 = new
GenericRuleReasoner(Rule.parseRules(rule));
InfModel inf = ModelFactory.createInfModel(reasoner2, model);
Query query = QueryFactory.create(queryString);
QueryExecution qe = QueryExecutionFactory.create(query, inf);
ResultSet results = qe.execSelect();
ResultSetFormatter.out(System.out, results, query);
qe.close();
