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Re: XType considered harmful

From: Richard H. McCullough <rhm@PioneerCA.com>
Date: Sun, 4 Mar 2007 18:56:00 -0800
Message-ID: <CCD7731B023741EDA28FD9A671E5C691@rhmlaptop>
To: "Hans Teijgeler" <hans.teijgeler@quicknet.nl>
Cc: "Semantic Web at W3C" <semantic-web@w3.org>, "OWL at W3C" <www-rdf-logic@w3.org>, "Rob McCool" <robm@robm.com>, "Larry Lefkowitz" <larry@cyc.com>, "John De Oliveira" <johndcyc@gmail.com>

Obviously, I meant "ismem" relation.
I'm sorry to say that I'm creating many more typos since I started using
Windows Vista.  Vista has a nasty habit of executing things that you
point at, without waiting for you to click your mouse.

----- Original Message ----- 
From: "Richard H. McCullough" <rhm@PioneerCA.com>
To: "Hans Teijgeler" <hans.teijgeler@quicknet.nl>
Cc: "Semantic Web at W3C" <semantic-web@w3.org>; "OWL at W3C" 
<www-rdf-logic@w3.org>; "Rob McCool" <robm@robm.com>; "Larry Lefkowitz" 
<larry@cyc.com>; "John De Oliveira" <johndcyc@gmail.com>
Sent: Sunday, March 04, 2007 6:08 PM
Subject: XType considered harmful


>I have previously argued that you should not use both "X" and "XType"
> classes in your ISO ontology.  My argument was based on my intuition
> gained from working on ontologies for many years.
> Now I have a concrete example, from the TAP knowledge base, showing
> that using "XType" just does not make sense.
>
> See http://mKRmKE.net/knowledge/tap/BADProductType.mkr
> for the details of the mKE responses to:
>    do find od *Color* in BOOT done;
>    LipColor isa* ?;
>    Product Type isc ?;
>    ProductType isc* ?;
> I was originally trying to find "Color" (a.g., red, blue, green).
> Not finding any "Color", I decided to explore "LipColor".
> The answer to my first question shows 5 separate paths to "Resource"!
> The first path makes sense
> 
> LipColor\LipMakeUp\MakeUp\CosmeticProduct\HealthCareProduct\Product\Tangible\Resource
> This path is part of a "normal" ontological partition of Resource.
> The other 4 paths essentially reproduce this path with one or more 
> concepts
> deleted, and the last 3 concepts replaced by
>    Product Type\Class\Resource
> Using both "Product" and "Product Type" has cluttered the hierarchy with
> worthless information.
>
> You can see this even more clearly in
> http://mKRmKE.net/knowledge/tap/BADspo.tap.
> The Resource/Class/ProductType sub hierarchy reproduces pieces of
> the Resource/Tangible/Product sub hierarchy.
>
> As I stated before, the correct approach is to let "Class" and "XType" be
> sets, which are related to other classes by the "imem" relation.
>
> Dick McCullough
> mKE do enhance od "Real Intelligence" done;
> knowledge := man do identify od existent done;
> knowledge haspart proposition list;
> http://mKRmKE.org/
>
Dick McCullough
mKE do enhance od "Real Intelligence" done;
knowledge := man do identify od existent done;
knowledge haspart proposition list;
http://mKRmKE.org/
Received on Monday, 5 March 2007 02:56:54 GMT

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