else if(tcgOCLAtomConstraint.getElement() instanceof RealLiteralExp){
RealLiteralExp oRealExp = (RealLiteralExp) tcgOCLAtomConstraint.getElement();
result.append(oRealExp.getRealSymbol());
}
else if(tcgOCLAtomConstraint.getElement() instanceof BooleanLiteralExp){
BooleanLiteralExp oBoolExp = (BooleanLiteralExp) tcgOCLAtomConstraint.getElement();
result.append(oBoolExp.getBooleanSymbol());
}
else if (tcgOCLAtomConstraint.getElement() instanceof IntegerLiteralExp) {
IntegerLiteralExp oIntExp = (IntegerLiteralExp) tcgOCLAtomConstraint.getElement();
result.append(oIntExp.getIntegerSymbol());
}