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
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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