[tdwg-content] If you need something for referring to a population, then it is probably best to do it as a related class

Hilmar Lapp hlapp at nescent.org
Mon May 9 17:12:44 CEST 2011

On May 9, 2011, at 4:24 AM, Mikel Egaña Aranguren wrote:

> Just to add to the discussion, puning can be used to model clases as  
> instances. In fact, a common pattern I'm seing and I'm using is to  
> use puning and have a class hierarchy, each class having an instance  
> with the same URI, so one can refer to each class as a class or as  
> an instance, depending on the context.

The punning feature in OWL2 is very nice indeed. But one should not  
forget that depending on the use the subject (or object) is either the  
class *or* the instance. I.e., there is a "class view" of the resource  
identified by the URI,  and an instance view. This is different from  
referring to a class as an instance. So things you say about the URI  
using object properties you say about the instance identified by that  
URI, just as you would if you used a generated instance URI, and the  
rules that apply to that are no different from the rules that apply if  
you said those things about an instance with a randomly generated URI.  
For example, if you say conflicting things about it, you still say  
these about one and the same instance, not "some", possibly different,  

: Hilmar Lapp  -:- Durham, NC -:- informatics.nescent.org :

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