[QUANTITY] Data Model for Quantity v0.5

[Ed Shaya]

>
> That's probably beacuse I yet do not see the word UTYPE mentioned ...
>
> I understand that sophistication allows complete description of the 
> thing to be described,
> on the other hand semplicity allows fast development, and fosters 
> usability by the other
> working groups.
>
> Shouldn't we first concentrate on the latter?
>
No.  You can not design a jet fighter by continuous improvement on a 
bicycle.

> Alberto
>
>