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Re: [SKOS] Proposed Resolution for ISSUE 26: RelationshipBetweenLabels

From: Guus Schreiber <schreiber@cs.vu.nl>
Date: Tue, 27 Feb 2007 15:15:37 +0100
Message-ID: <45E43D09.4010102@cs.vu.nl>
To: Jon Phipps <jphipps@madcreek.com>
CC: SWD WG <public-swd-wg@w3.org>



Jon Phipps wrote:
> 
> Guus,
> 
> I'm uncomfortable with this resolution to the issue. Bearing in mind
> that I'm hardly an RDF expert, iIt seems inherently fragile to define
> a relationship between 2 literals independent of the concept for which
> they are labels.
> 
> In the Registry I'm usually thinking in the context of collections of
> concept schemes that may have considerable label duplication across
> schemes and mapped, transitive relationships between concepts in
> multiple schemes. It seems to me that simply declaring a relationship
> between literal labels without taking into account the labeled concept
> and it's related scheme won't provide the intended results.
> 
> What we're really trying to define is a relationship between 2
> statements about (properties of) a concept and, unless the object of
> the statement is a resource, this looks like a job for the dreaded
> reification, rather than the proposed solution.
> 
> I'm not happy with the implied need to declare a label as a resource
> either, but until someone figures out a way to uniquely identify a
> statement as a resource, I don't see an effective way around it.
> 
> Unless of course, I'm misunderstanding -- always a distinct possibility.

Jon,

Thanks for the remark. I intended indeed, as 
Antoine pointed out,  to make the 
contextualization explicit. So, I should have 
added something like the following to my proposal:

   - a property skos:hasLabelRelation (domain = 
skos:Concept, range = skos:LabelRelation) which is 
an InverseFunctionalProperty (each LabelRelation 
uniquely identifies a Concept as its context).

My proposal is based on the assumption that the 
vast majority of thesauri will not have label 
relations, and therefore I wish not to have the 
burden of terms as classes on them. But I'm happy 
to be convinced my assumption is wrong.

Guus

> 
> --Jon
> 
> On 2/27/07, Guus Schreiber <schreiber@cs.vu.nl> wrote:
>>
>> ISSUE-26 [1]
>> RelationshipsBetweenLabels
>>
>> Considering that:
>> - representing lexical labels as classes would
>> lead to an undesirable complication of SKOS in
>> straightforward use cases for the application of SKOS,
>> - representing relationships between labels is
>> required in some use cases, and therefore an
>> escape mechanism should preferably be available
>> for such thesauri,
>>
>> I propose the WG opts for an amended version of
>> the second solution proposed in [2]:
>>
>> RESOLUTION
>>
>> The WG resolves to add the following classes and
>> properties to the SKOS specification [3]:
>>
>> - the class skos:LabelRelation
>> - the properties skos:labelRelationSubject and
>> skos:labelRelationObject with domain LabelRelation
>> and range rdfs:literal
>>
>> In addition, the SKOS Guide should describe
>> guidelines for SKOS users to define their label
>> relations as specializations of LabelRelation and
>> gives examples of its intended usage. The SKOS
>> specification refrains for now to predefine
>> specializations of LabelRelation.
>>
>> Contrary to the proposal in [2] the class
>> LabelRelation is not defined as a subclass of
>> skos:Annotation (which is in any case not yet part
>> of the spec), as it is not an "annotation", but a
>> lexical relationship.
>>
>>
>> [1] http://www.w3.org/2006/07/SWD/track/issues/26
>> [2]
>> http://www.w3.org/2006/07/SWD/wiki/SkosDesign/RelationshipsBetweenLabels
>> [3] http://www.w3.org/TR/swbp-skos-core-spec/
>>
>> -- 
>> Vrije Universiteit Amsterdam, Computer Science
>> De Boelelaan 1081a, 1081 HV Amsterdam, The Netherlands
>> T: +31 20 598 7739/7718; F: +31 84 712 1446
>> Home page: http://www.cs.vu.nl/~guus/
>>
>>
> 

-- 
Vrije Universiteit Amsterdam, Computer Science
De Boelelaan 1081a, 1081 HV Amsterdam, The Netherlands
T: +31 20 598 7739/7718; F: +31 84 712 1446
Home page: http://www.cs.vu.nl/~guus/
Received on Tuesday, 27 February 2007 14:16:16 GMT

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