How to set the Base User Column Name in UDT as a numerical value?

Hello Experts,

Is it possible to designate the Base User Column Name in a UDT as a numerical value, specifically as a Grade ID? Our objective is to set the Base User Column Name to Grade ID because we have a scenario wherein selecting this particular Grade will trigger the display of values configured in the UDT.

Alternatively, are there any other methods to fulfill this requirement using a DFF and UDT?

Thanks in advance.