code: private static boolean uriRangeFilter(final Triple triple) {
          return invalidMembershipProperty(triple)
                          || (propertiesWithUriRange.contains(triple.getPredicate())
                                          && !(triple.getObject() instanceof IRI))
                          || (RDF.type.equals(triple.getPredicate()) && !(triple.getObject() instanceof IRI));
      }
docs: Verify that the range of the property is an IRI (if the property is in the above set)