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>