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Re: continuation: rdfs:range with dcterms:isPartOf

From: Stephen Rhoads <rhoadsnyc@mac.com>
Date: Thu, 23 Sep 2004 14:12:23 -0400
Message-ID: <6887400.1095963143711.JavaMail.rhoadsnyc@mac.com>
To: kurt.godden@GM.com
Cc: www-rdf-interest@w3.org

Only use domain and range constraints when you truly want to restrict a property on a global basis.  A better way to model is to use DLs:

Class(Brakepad partial
   restriction(isPartOf someValuesFrom(BrakeAssembly)))

Class(BrakeAssembly partial
   restriction(isPartOf someValuesFrom(Vehicle))
   restriction(hasPart someValuesFrom(BrakePad)))

Class(Vehicle partial
   restriction(hasPart someValuesFrom(BrakeAssembly)))

ObjectProperty(isPartOf Transitive inverseOf(hasPart))
ObjectProperty(hasPart Transitive inverseOf(isPartOf))

--- Stephen

 
On Thursday, September 23, 2004, at 09:22AM, <kurt.godden@GM.com> wrote:

>
>Oops, I accidentally sent that before I was done.  Just a wee bit more:
>
>So it seems to me that I should simply omit specifying any ranges for
>isPartOf.  Then I can attach it to any domain that I need.  Does that sound
>reasonable to others?
>
>-KG
>
>----- Forwarded by Kurt S Godden/US/GM/GMC on 09/23/2004 09:18 AM -----
>                                                                                                                                          
>                      kurt.godden@gm.com                                                                                                  
>                      Sent by:                    To:       www-rdf-interest@w3.org                                                       
>                      www-rdf-interest-req        cc:                                                                                     
>                      uest@w3.org                 Subject:  rdfs:range with dcterms:isPartOf                                              
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>                      09/23/2004 09:10 AM                                                                                                 
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>Suppose
>Brakepad isPartOf BrakeAssembly.
>and
>BrakeAssembly isPartOf Vehicle.
>
>It seems like I can NOT specify that there is an rdfs:range on
>dcterms:isPartOf for the class Vehicle as well as the class BrakeAssembly.
>The reason is because the RDF Schema spec says "Where P has more than one
>rdfs:range, then the resources denoted by the objects...are instances of
>*all* the classes..." [emphasis added].
>
>Kurt Godden
>GM Technical Fellow
>GM R&D, Warren, MI
>ph: 586-986-0445; em: kurt.godden@gm.com
>
>"I distrust a research person who is always obviously busy on a task."
>   ---Robert A. Frosch, VP (retired), GM Research
>
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Received on Thursday, 23 September 2004 18:12:30 GMT

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