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Re: [dxwg] Revisiting the definition of "profile" (#963)

From: Karen Coyle via GitHub <sysbot+gh@w3.org>
Date: Mon, 15 Jul 2019 14:55:39 +0000
To: public-dxwg-wg@w3.org
Message-ID: <issue_comment.created-511436916-1563202538-sysbot+gh@w3.org>
https://stackoverflow.com/questions/2218937/has-a-is-a-terminology-in-object-oriented-language
http://java8.in/is-a-relationship-and-has-a-relationship/

IS A and HAS A are fairly commonly used both in O-O and in the preceding
philosophical branch. It refers to typing, and therefore is a class
relationship. I don't know of an equivalent that indicates "instance of"
although now that I think about it, "instance of" sounds ambiguous to me
(it would have to be an IS A relationship). I'm going to ponder that one
for a bit.

kc

On 7/14/19 10:10 PM, Simon Cox wrote:
> The global constraint is not enough. It merely says 'if there is a
> |prof:isProfileOf| relationship then it is from a |prof:Profile| to a
> |prof:Standard|. But it does not require that the relation be present in
> an instance. To achieve that you also need a local constraint on the
> |prof:Profile| class
> 
> |prof:Profile rdfs:subClassOf [ rdf:type owl:Restriction ;
> owl:minCardinality "1"^^xsd:nonNegativeInteger ; owl:onProperty
> prof:isProfileOf ; ] ; .. |
> 
> Aside: IS A is ambiguous. I assume you mean 'is a kind of', rather than
> 'is an instance of'
> 
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-- 
Karen Coyle
kcoyle@kcoyle.net http://kcoyle.net
skype: kcoylenet


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