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Re: class and inviduals

From: Marcel Ferrante <marcelf@gmail.com>
Date: Tue, 16 Nov 2010 09:00:06 -0200
Message-ID: <AANLkTikHuUr-3uhvJicUwHnnPJQGqpUnJCjxG=+zVNwm@mail.gmail.com>
To: public-owl-dev@w3.org
Hi Aldo and Alex,

I understand the modelling issue that "ferrari enzo" could be class or
individual.
I have no doubt in this relation:

(class) Ferrari Enzo
   (instance of) My Ferrari Enzo

The problem is:

(class) Car
  (subclass of) Sport Car
      ????   Ferrari Enzo

What relation has between Sport Car and Ferrari Enzo ? It will be a class or
individual in this case?
Ive saw many times examples of class/individual like Airplane/Boing 747. Its
all wrong ?

Thanks
Marcel


2010/11/16 Alex Shkotin <alex.shkotin@gmail.com>

> Hi Marcel,
>
> if you keep in mind particular material thing then use individual.
> But you need something like factory serial number to identify it properly.
> Well, or any other attributes to refer exactly to this thing in a real
> world;-)
> We may keep in mind all produced "ferrari enzo" or all existing "ferrari
> enzo".
> These should be individuals too.
> If you think about 'what does it mean to be "ferrari enzo"?', and would
> like to give definition,
> then use class.
>
> Alex
>
> 2010/11/16 Marcel Ferrante <marcelf@gmail.com>
>
> Hi,
>>
>> Sometimes, when we define class and individual to students, appears some
>> doubts.
>>
>> For example:
>>
>> In the owl reference (http://www.w3.org/TR/owl-ref/) class is defined as
>> "abstraction mechanism for grouping resources with similar characteristics"
>> or class define a set of individuals with same characteristics in common.
>>
>> A good exemple is car (class) and ferrari enzo (individual).
>> But there is many cars that are ferrari enzo, so ferrari enzo could be a
>> class and Jonh's ferrari enzo an individual.
>>
>> So ferrari enzo could be a class and an invidividual in the same ontology
>> ? Or ferrari enzo could be a subclass of car,
>> but its diferent than a tradiconal subclass like sport car.
>>
>> Is there a more clear definition of class and individual ?
>>
>> Thanks in advance,
>> Marcel
>>
>>
>>
>> --
>> Marcel Ferrante Silva
>> <http://www.finaltec.com.br>+55 31 8851-9069 3785-9069
>> skype: marcelferrante
>> gtalk: marcelf@gmail.com
>>
>>
>>
>


-- 
Marcel Ferrante Silva
"All the people in this earth are truly one"
<http://www.finaltec.com.br>+55 31 8851-9069 3785-9069
skype: marcelferrante
gtalk: marcelf@gmail.com
Received on Tuesday, 16 November 2010 11:00:40 GMT

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