[QUANTITY] Data Model for Quantity v0.5 - more on Quantity vs assembly

[Pierre Didelon]

Martin @ ROE wrote:


> Single inheritance models are
> extremely restricting - if down the road we find we need to change 
> something in Frame for example, we risk breaking every single VO 
> quantity in the whole model...
OK but mainly for data structure, isn't it?
for interface/behaviour impact can be "more" restricted/contained?
PiD