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[protege-discussion] Jim Likes Dogs

Martin Kuba makub at ics.muni.cz
Mon Jun 25 00:35:19 PDT 2012


Hi all,

I think that "Jim likes dogs" means

Individual: Jim
     Types:
         likes min 2 Dog

Just my 2 cents.

Best regards

Martin

Dne 25.6.2012 09:13, Thomas Schneider napsal(a):
> On 25.06.2012, at 07:17, Jim Tivy wrote:
>
>> Using classes to express what is essentially an object property assertion on
>> Jim seems wrong to me.
>>
>> I counter by saying this is a shortcoming of OWL2.
>
> Why should it be? What are you missing? At least you can't blame OWL as long as you're not clear about what exact part of "Jim likes Dogs" you're desperate to express.
>
> If you want to make a statement about all members of the class Dog, then Timothy's two suggestions are perfectly OK and fully capture the fact that Jim likes all (or some) dog.
>
> If you need to distinguish between liking a particular member of the class Dog and liking dogs in general, you can use a different object property and Timothy's first suggestion. This seems fine to me because then there doesn't seem to be an obvious logical connection between this new OP and the old "likes": if I like some dog, it doesn't mean that I like all dogs and vice versa. If you still see a logical connection, chances are that you can express it in OWL too.
>
> If you insist on using object property assertions (are you sure you meant "object property assertion"?), you could introduce a new individual "dog" and use an object property assertion between "jim" and "dog". If you need to relate "dog" back to the class "Dog", you can follow Timothy's first suggestion once again, using a different OP such as "represents".
>
> Perhaps there is a more standard way of modelling that last one, but definitely I cannot agree with your claimed "shortcoming" because I don't see what you're missing.
>
> Cheers
>
> Thomas


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CERIT-SC                               Martin Kuba
Institute of Computer Science    email: makub at ics.muni.cz
Masaryk University             http://www.ics.muni.cz/~makub/
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