code: def getClassDirectSubs(self, aURI):
          
          aURI = aURI
          qres = self.rdflib_graph.query("""SELECT DISTINCT ?x
                   WHERE {
                       { ?x rdfs:subClassOf <%s> }
                       FILTER (!isBlank(?x))
                   }
                   """ % (aURI))
          return list(qres)
docs: 2015-06-03: currenlty not used, inferred from above