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[protege-owl] RE : Re: I don’t understand, did you...

Fatiha Latfi fatiha_latfi at
Fri Sep 15 10:52:31 PDT 2006

Hi Tania,
  No, I verified this too yesterday, owl:Thing is still there and when I want to add a (Person sub-class) to the domain of the property that I am creating, the error message is : 
  Invalid domain : The class owl:Thing is already in the domain.
  Thanks again.

Tania Tudorache <tudorache at> a écrit :

What I suppose that it happened, was that the owl:Thing was deleted from 
the Necessary Conditions of your class. That is why it dissapears from 
the class tree. It is still in the ontology, but it does not have the 
parent set. There should be no "orphan" classes in the ontology. 
Probably this was caused by some bug in one of the widgets. Let me know 
if you can reproduce the bug, so that we can fix it.


Fatiha Latfi wrote:

> Hi all,
> I don't understand. I have two principal classes in my ontology. 
> Person and Deficiencies. When I wanted to create a property and wanted 
> to fix the domain in a subclass of Person, I did not see it
 the class 
> person was invisible on the subclass browser but i see it in the 
> OWLViz tree. The big problem is... that it appears alone, it's not 
> linked to owl:Thing. What happened? I don't know. Fortunately, I had a 
> backup.
> Thanks.
> Fatiha.
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