Automatic document numbering

Hi,

I'm using Unifier 10.

In Document Manager module, I wonder whether we can add a field call Document ID and configure it to have value automatically.

For example:

I created a field named Document Type (Pull-down menu) containing value : Drawing, Specification, Contract.

If I choose Document Type is Drawing, the Document ID field will automatically be populated : DRAW-*****   (The ***** will be the sequence number)

Hope to receive advice from you guys.

Thanks

Khuong.