Amount Conversion in Words

Hi,

I want to convert amount in words for which I'm using below command in xml.

<?xdofx:to_check_number(amount, precisionOrCurrency, caseType, decimalStyle)?>

But the issue is, I want to insert minimum condition in the above command which is xdoslt and to_check_number is xdofx.

Example:

<?xdofx:to_check_number(minimum(amount), precisionOrCurrency, caseType, decimalStyle)?>

How can I achieve my example command?

Thanks