Hi Michele,
UDT of type 'No Object' and 'Master Data' will have this Code and Name field.
UDT of type 'Document' will have DocEntry and DocNumber field.
Creating UDT without the two pairs is not possible. But as Pedro pointed out, you can always create another key columns and set it as UNIQUE Key.
As for the Code/Name you can work around it by using a Formatted Search to automatically keep increasing the value on screen,
or if inserting via code is involved, you need to increase this value using your code.
Regards
Edy