final String[] prefConst = (String[]) obj.rightExpr.accept(this, arg);
constOpR.setConstant(prefConst[1]);
constOpR.getConstantComboBox().setSelectedItem(prefConst[0]);
constOpR.setSelectedPrefix(prefConst[0]);
final OperatorIDTuple<Operator> oidtConst = new OperatorIDTuple<Operator> (constOpR, 0);
frameOperator.addSucceedingOperator(oidtConst);
break;
case Scout.RULEPREDICATE:
if(right instanceof UnitermOperator){
final UnitermOperator factOpR = (UnitermOperator) right;