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Re: SKOS Comment (Reference WD June 2008) - broaderTransitive < broader, narrowerTransitive < narrower

From: Alasdair Gray <agray@dcs.gla.ac.uk>
Date: Fri, 25 Jul 2008 15:41:05 +0100
Cc: 'Ana Oliveira' <ana.quirino.oliveira@gmail.com>, <public-esw-thes@w3.org>, <public-swd-wg@w3.org>
Message-Id: <4A86686A-FE35-41E6-81D3-90B97CD05FD6@dcs.gla.ac.uk>
To: Alistair Miles <alistair.miles@zoo.ox.ac.uk>

Hi Alistair,

Until the workshop in London at the start of this week I had been  
unclear about when to use skos:broader and skos:broaderTransitive.  
Antoine's talk really cleared this up for me. However, the way you  
have worded the reply below would, I think, help. That is, give the  
motivation for the two and then explain them. Perhaps an example helps  
as well.

Thanks to all the speakers on Monday,

Alasdair

On 25 Jul 2008, at 11:34, Alistair Miles wrote:

>
> Dear Joao Alberto,
>
> Thank you for your comment.
>
> I know Antoine has already responded, but I thought I'd add a slightly
> different way of looking at it:
>
> The property skos:broader represents a *direct* hierarchical link  
> between
> two concepts.
>
> The property skos:broaderTransitive represents a *direct or indirect*
> hierarchical link between two concepts.
>
> The set of *direct* links is clearly a sub-set of the set of *direct  
> or
> indirect* links.
>
> Hence skos:broader is a sub-property of skos:broaderTransitive.
>
> The WG is very conscious that this point has caused a lot of  
> confusion. Any
> suggestions for how to make this pattern clearer are warmly welcomed.
>
> Kind regards,
>
> Alistair.
>
> --
> Alistair Miles
> Senior Computing Officer
> Image Bioinformatics Research Group
> Department of Zoology
> The Tinbergen Building
> University of Oxford
> South Parks Road
> Oxford
> OX1 3PS
> United Kingdom
> Web: http://purl.org/net/aliman
> Email: alistair.miles@zoo.ox.ac.uk
> Tel: +44 (0)1865 281993
>
>
>> -----Original Message-----
>> From: public-swd-wg-request@w3.org [mailto:public-swd-wg-
>> request@w3.org] On Behalf Of Ana Oliveira
>> Sent: 26 June 2008 03:44
>> To: public-swd-wg@w3.org
>> Subject: SKOS Comment (Reference WD June 2008) - broaderTransitive <
>> broader, narrowerTransitive < narrower
>>
>> Dear SKOS Editors,
>>
>> The definition S19 states that:
>>    "S19  skos:broader is a sub-property of skos:broaderTransitive and
>> skos:narrower is a sub-property of skos:narrowerTransitive".
>>
>> I think the correct form should be:
>>    "S19  skos:broaderTransitive is a sub-property of skos:broader and
>> skos:narrowerTransitive is a sub-property of skos:narrower".
>>
>> because "to be broader transitive" is a specific case of "to be
>> broader" (or narrower). The generic property should subsumes the
>> specific one.
>>
>>     If my comment is correct, it is necessary to adjust the "full set
>> of sub-property relationships" diagram (above "Example 53") to follow
>> this new hierarchy.
>>
>> Best
>>
>> Joao Alberto de Oliveira Lima
>>
>> PS. This same comment was done in March'08 by
>> http://lists.w3.org/Archives/Public/public-swd-wg/2008Mar/0089.html
>
>
>

Dr Alasdair J G Gray
agray@dcs.gla.ac.uk
http://www.dcs.gla.ac.uk/~agray/
http://explicator.dcs.gla.ac.uk/
Received on Friday, 25 July 2008 14:41:48 GMT

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