On 18/09/16 14:37, javed khan wrote:
Hello Dave, thank you for your comment but is the semantic (logic) in the
rule above correct? Because it does not give me the required result and
when I query ?student rdf:type std:GoodStudent, it does not give me any

It should work if the details are correct. If you can't get it to work then reduce it to a complete minimal example, with actual data and a correct version of the rule, and maybe someone can spot the problem.


On Sun, Sep 18, 2016 at 1:11 AM, Dave Reynolds <dave.e.reyno...@gmail.com>

On 17/09/16 22:31, javed khan wrote:

The error goes away but the rules does not work i-e I can not find the rdf
type of GoodUser/GoodStudent.
Also after result display, it gives me some exception .

Exception in thread "AWT-EventQueue-0"
com.hp.hpl.jena.reasoner.rulesys.Rule$ParserException: Triple with 4
At '[ rule1: ( ?x http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org/t/ontologies/2016/7/myOWL#User ) (
http://www.semanticweb.org/t/ontologies/2016/7/myOWL#score ?score + ) '

Look closely at the line above. You can see that there's a spurious "+"
character in your string.


On Sat, Sep 17, 2016 at 12:15 PM, javed khan <javedbtk...@gmail.com>

String rule="[rule1:(?x   http://www.w3.org/1999/02/22-rdf-syntax-ns#type
 http://www.semanticweb.org#Student) " +

         "( http://www.semanticweb.org#Student
http://www.semanticweb.org#GPA  ?gpa    )   +  greaterThan(?gpa, 3)

         " ->  (?x   http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.semanticweb.org#GoodUser )]";

GPA is a data property here, but it gives me error. I think the error is
in greaterThan(?score, 10)

What is the error ?

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