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[protege-owl] class

Jean-Marc Vanel jeanmarc.vanel at gmail.com
Sun Jul 18 06:15:44 PDT 2010


2010/7/18 Heinzle <heinzle at furb.br>

>  Hello!
>
> Maybe someone can help me: What does it mean a class called Nothing
> included in my Inferred Class Hierarchy?
>
> This class doesn´t exist in the Asserted Class Hierarchy. Why is it
> included?
>
 This is the super-class of all classes whose definition is
self-contradictory, so that they cannot have instances (like the ice-cream
in the Pizza example).
So "Nothing" appears just as a place holder.
-- 
Jean-Marc Vanel
Consulting, services, training,
Rule-based programming, Semantic Web
http://jmvanel.free.fr/
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