Thanks Soroka for your help. On Tue, Sep 6, 2016 at 12:46 PM, A. Soroka <[email protected]> wrote:
> [ exstu: (?stu rdf:type Student), (?stu marks ?m), greaterThan(?m, 60) -> > (?stu rdf:type ExcellentStudents) ] > > is one way to do this. Please look at the examples on that same page. > > --- > A. Soroka > The University of Virginia Library > > > On Sep 6, 2016, at 3:30 PM, javed khan <[email protected]> wrote: > > > > Thanks Soroka. > > > > I do not know how to use* greaterThan(?x, ?y) here in my case? How can I > > compare the marks data property with this?* > > > > On Tue, Sep 6, 2016 at 12:09 PM, A. Soroka <[email protected]> wrote: > > > >> https://jena.apache.org/documentation/inference/index.html#RULEbuiltins > >> > >> --- > >> A. Soroka > >> The University of Virginia Library > >> > >>> On Sep 6, 2016, at 3:05 PM, javed khan <[email protected]> wrote: > >>> > >>> I have *Student* class, having *ExcellentStudents* and *PoorStudents* > as > >>> subclasses. > >>> My ontology contains Student *marks* (*marks is data property*) and > based > >>> on marks students can be assigned to ExcellentStudents and > PoorStudents. > >>> > >>> My requirements is to achieve it using Jena rules. I need some help in > >>> getting to this. I want something like : > >>> > >>> If Student X marks>60, assign Student X to ExcellentStudent class else > >>> assign to PoorStudents class. I have attempted the following but could > >> not > >>> succeeded. > >>> > >>> > >>> String rule = "[rule1:"(?x > >>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type > >>> http://www.owlontologies.com/Student.owl#*Student*)+ > >>> > >>> (?x http://www.owl-ontologies.com/Student.owl#marks *>60*)" + > >>> > >>> > >>> "->(?x http://www.w3.org/1999/02/22-rdf-syntax-ns#type > >>> http://www.owlontologies.com/Student.owl#*ExcellentStudent*)]"; > >>> > >>> > >>> I think the problem will be in marks>60 because I do not know how to > >>> compare things inside Jena rules. > >> > >> > >
