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[protege-discussion] An interesting pizza... or max and exactly cardinality not working?

Thomas Russ tar at ISI.EDU
Tue Sep 8 12:44:03 PDT 2009

On Sep 7, 2009, at 1:58 AM, maarten wrote:

> Hi all,
> Studying the pizza.owl, I didn't get cardinalities max or exactly to  
> work the way I expected.
> An interesting pizza has the following equivalent class: Pizza and  
> hasTopping min 3 Thing
> When I change this (or create a similar pizza) with 'max' or  
> 'exactly' instead of 'min', I don't get the expected result (e.g.  
> all pizzas with 3 or less toppings, or exactly 3 toppings).
> I'm quite new to owl modeling and protege 4, so I'm probably missing  
> something.

Open world semantics.

If you search on the protege-owl mailing list archives, this comes up  
quite frequently.

For example:

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