HEX
To perform a HEX check, specify the check item TYPE attribute as HEX. A HEX check allows you to specify a variable that contains only hexadecimal characters (0-9, A-F).
Here is an example where a HEX check in the hexc variable class
validates hexadecimal values:
<!doctype dm system>
<varclass name=hexc type='CHAR 2'>
<checkl msg=liba008>
<checki type=hex>
</checkl>