Are you sure that this code compiles? > Property prop= model.getProperty(ns,"GPA");
ns is a String in your code, the method expects a Resource object is first argument. You totally use the wrong method here, as it returns a Statement. Model::createProperty(String nameSpace, String localName) would be the method to call, or even better as you use an OntModel OntModel::getDatatypeProperty( String uri ) -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center
