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Re: Why little usage of ObjectProperty

From: Richard H. McCullough <rhm@volcano.net>
Date: Wed, 12 Oct 2005 02:36:09 -0700
Message-ID: <001b01c5cf10$8d99f230$0100000a@rhm8200>
To: "Gong Cheng" <gcheng@seu.edu.cn>, "Semantic Web W3C" <semantic-web@w3c.org>
Cc: "Semantic Web Yahoo" <semanticweb@yahoogroups.com>

In the broader context of knowledge representation,
properties can be classified as follows

definition - genus/differentia or union/intersection (Restrictions)
part - components of a single entity
attribute - static properties of a single entity
relation - property relating two or more entities
action - dynamic properties of a single entity
interaction - dynamic properties of two or more entities
hierarchy - subClassOf, subPropertyOf

Since OWL does not "know" most of these subclasses,
you may well ask "why bother" to distinguish
ObjectProperty from Property?
I think it all depends on the context of your
application.  Just ask yourself whether the distinctions
listed above are important in your application.

Dick McCullough
knowledge := man do identify od existent done;
knowledge haspart proposition list;
----- Original Message ----- 
From: "Gong Cheng" <gcheng@seu.edu.cn>
To: "Semantic Web W3C" <semantic-web@w3c.org>
Cc: "Semantic Web Yahoo" <semanticweb@yahoogroups.com>
Sent: Wednesday, October 12, 2005 12:26 AM
Subject: Why little usage of ObjectProperty

> Hi all,
> I'm new to SW and Ontology. I have read some ontologies but found that 
> little ObjectProperty is used. In my opinion, ObjectProperty represents 
> the relationship between concepts. It is very important in the model as 
> well as in the real world. But in most ontologies, it is really hard to 
> find customed ObjectProperty except for the subClassOf, hierarchy I mean.
> So is ObjectProperty really unimportant?
> I'm looking forward to your suggestions!
> Regards,
>                  Gong Cheng
> -------------------------------------------------------------
> Gong Cheng
> Department of Computer Science and Engineering
> Southeast University, Nanjing, P. R. China
> Phone:        +86-(0)25-83793235
> Fax:          +86-(0)25-83794838
> E-mail:       gcheng@seu.edu.cn
> Address:      Department of Computer Science and Engineering
>              Southeast University
>              Nanjing 210096, P. R. China
> -------------------------------------------------------------
Received on Wednesday, 12 October 2005 09:37:37 UTC

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