Why have instance of item and instance of superclass of that item?
If Glasgow is instance of : city of Scotland and
City of Scotland is subclass of : city
Then we should not have Glasgow instance of : city
This principle should cut down a lot of these extra 'instances '
Joe
On Sat, 28 Nov 2015 15:51 Federico Leva (Nemo) <nemowiki(a)gmail.com> wrote:
Gerard Meijssen, 28/11/2015 07:05:
A big city is what? A city with more than a given
number of inhabitants?
If so it is redundant because it can be inferred.
Criteria might be defined by local law and/or require some
administrative act. That's how it works in Italy, for instance.
Nemo
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