 of system that deal with oil rigs (and biological
&gt;classifications), this might be a useful revision (ontological reduction).
&gt;If you have some examples, I would be interested.

Well, one can easily give 'physical' examples of the 
continuant/occurrent distinction: a car vs. its lifetime, the 
location of a football match vs. the match itself. I think the key 
point is the idea of there being a thing which endures through time 
but doesnt occupy any amount of time, and that thing might be almost 
any