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

From: Miles, AJ \(Alistair\) <A.J.Miles@rl.ac.uk>
Date: Tue, 20 Mar 2007 12:28:05 -0000
Message-ID: <677CE4DD24B12C4B9FA138534E29FB1D0285A281@exchange11.fed.cclrc.ac.uk>
To: "Mark van Assem" <mark@cs.vu.nl>, <public-esw-thes@w3.org>
Cc: "SWD WG" <public-swd-wg@w3.org>

Hi Mark,

The first example I gave (animals/fauna) was meant to illustrate how a
"terms-as-classes" representation can be defined as an extension of my
proposal [1].

The second example I gave (Corporation/Corp. - which you quote below)
was meant to illustrate how an "n-ary relations" representation can be
defined an extension of my proposal [1]. I.e. the second example had
nothing to do with "terms-as-classes".

Does that clarify?

Cheers,

Alistair.
 

> -----Original Message-----
> From: Mark van Assem [mailto:mark@cs.vu.nl] 
> Sent: 20 March 2007 12:07
> To: Miles, AJ (Alistair); public-esw-thes@w3.org
> Subject: Re: [SKOS] Proposed Resolution for ISSUE 26: 
> RelationshipBetweenLabels
> 
> Hi Alistair,
> 
> Why is terms-as-classes an extension of [1]? The whole idea of 
> terms-as-classes is that properties can be made between the 
> term-classes (i.e. between two URIs), while [1] assigns no 
> URI to them 
> but simply repeats the literal. If the range of 
> abbreviatedForm were a 
> resource (URI) instead of a literal, then I would agree that they are 
> equivalent (but still not an extension).
> 
> ex:A a skos:Concept;
>    skos:prefLabel "Corporation"@en;
>    skos:altLabel "Corp."@en;
>    skos:annotation [
>      a ex:AbbreviationRelation;
>      ex:abbreviatedForm "Corp."@en;
>      ex:fullForm "Corporation"@en;
>    ].
> 
> Cheers,
> Mark.
> 
> [1]http://lists.w3.org/Archives/Public/public-swd-wg/2007Mar/0092.html
> 
> Miles, AJ (Alistair) wrote:
> > As a point of interest, note that a representation following the
> > "terms-as-classes" pattern can actually be defined as an 
> *extension* of
> > my proposal at [1]. Guus' proposal [3] (which follows the "n-ary
> > relations" pattern) can *also* be derived as an extension of [1]. 
> > 
> > This demonstrates that it is not a simple "either-or" 
> choice between the
> > "terms-as-classes" and "n-ary relations" patterns described at [2].
> > There is a solution [1] from which both approaches may be derived as
> > extensions.
> > 
> > Example "terms-as-classes" extension ...
> > 
> > --- Begin Turtle ---
> > 
> > @prefix ex: <http://www.example.com/example#>.
> > # skos: rdfs: rdf: xsd: conventional namespace prefixes
> > 
> > # Define the extension
> > 
> > ex:ThesaurusTerm rdfs:subClassOf skos:Annotation.
> > ex:preferredTerm rdfs:subPropertyOf skos:annotation;
> >   rdfs:range ex:ThesaurusTerm.
> > ex:nonPreferredTerm rdfs:subPropertyOf skos:annotation;
> >   rdfs:range ex:ThesaurusTerm.
> > ex:literalValue rdfs:subPropertyOf skos:annotatesLiteral;
> >   rdfs:domain ex:ThesaurusTerm.
> > 
> > # Apply extended vocabulary
> > 
> > ex:A a skos:Concept;
> >   skos:prefLabel "animals"@en;
> >   skos:altLabel "fauna"@en;
> >   ex:preferredTerm [
> >     a ex:ThesaurusTerm;
> >     ex:literalValue "animals"@en;
> >   ];
> >   ex:nonPreferredTerm [
> >     a ex:ThesaurusTerm;
> >     ex:literalValue "fauna"@en;
> >   ].
> > 
> > --- End Turtle ---
> > 
> > Example "n-ary relations" extension ...
> > 
> > --- Begin Turtle ---
> > 
> > @prefix ex: <http://www.example.com/example#>.
> > # skos: rdfs: rdf: conventional namespace prefixes
> > 
> > # Define the extension
> > 
> > ex:LabelRelation rdfs:subClassOf skos:Annotation.
> > ex:AbbreviationRelation rdfs:subClassOf ex:LabelRelation.
> > ex:labelRelationSubject rdfs:subPropertyOf skos:annotatesLiteral;
> >   rdfs:domain ex:LabelRelation.
> > ex:labelRelationObject rdfs:subPropertyOf skos:annotatesLiteral;
> >   rdfs:domain ex:LabelRelation.
> > ex:hasLabelRelation rdfs:subPropertyOf skos:annotation;
> >   rdfs:range ex:LabelRelation.
> > 
> > # Apply extended vocabulary 
> > 
> > ex:B a skos:Concept;
> >   skos:prefLabel "Corporation"@en;
> >   skos:altLabel "Corp."@en;
> >   ex:hasLabelRelation [
> >     a ex:AbbreviationRelation;
> >     ex:labelRelationSubject "Corporation"@en;
> >     ex:labelRelationObject "Corp."@en;
> >   ].
> > 
> > --- End Turtle ---
> > 
> > Finally, note that the proposal [1] is also a solution to 
> the issue of
> > annotations on labels. 
> > 
> > Cheers,
> > 
> > Alistair.
> > 
> > [1] 
> http://lists.w3.org/Archives/Public/public-swd-wg/2007Mar/0092.html
> > [2]
> > 
> http://www.w3.org/2006/07/SWD/wiki/SkosDesign/RelationshipsBet
> weenLabels
> > [3] http://lists.w3.org/Archives/Public/public-swd-wg/2007Feb/0181
> > 
> > 
> >> -----Original Message-----
> >> From: public-swd-wg-request@w3.org 
> >> [mailto:public-swd-wg-request@w3.org] On Behalf Of Miles, AJ 
> >> (Alistair)
> >> Sent: 19 March 2007 17:42
> >> To: Guus Schreiber; SWD WG
> >> Cc: public-esw-thes@w3.org
> >> Subject: RE: [SKOS] Proposed Resolution for ISSUE 26: 
> >> RelationshipBetweenLabels
> >>
> >>
> >> I would like to offer an alternative proposal. This proposal 
> >> is similar
> >> to Guus' original proposal [1] with the modification given in [2].
> >> However, it it slightly more flexible, making less commitment than
> >> [1]+[2].
> >>
> >>  - Vocabulary
> >>
> >> skos:Annotation skos:annotation skos:annotatesLiteral
> >>
> >>  - Axiomatic Triples
> >>
> >> skos:annotation rdfs:range skos:Annotation.
> >> skos:annotatesLiteral rdfs:domain skos:Annotation.
> >> skos:annotatesLiteral rdfs:range rdfs:Literal.
> >>
> >>  - Additional Semantic Conditions:
> >>
> >> None.
> >>
> >>  - Consistent Examples:
> >>
> >> --- Begin Turtle ---
> >>
> >> @prefix ex: <http://www.example.com/example#>.
> >> # skos: rdfs: rdf: conventional namespace prefixes
> >>
> >> # first extend proposed vocabulary
> >>
> >> ex:AbbreviationRelation rdfs:subClassOf skos:Annotation.
> >>
> >> ex:abbreviatedForm rdfs:subPropertyOf skos:annotatesLiteral;
> >>   rdfs:domain ex:AbbreviationRelation.
> >>
> >> ex:fullForm rdfs:subPropertyOf skos:annotatesLiteral;
> >>   rdfs:domain ex:AbbreviationRelation.
> >>
> >> # now apply extended vocab
> >>
> >> ex:A a skos:Concept;
> >>   skos:prefLabel "Corporation"@en;
> >>   skos:altLabel "Corp."@en;
> >>   skos:annotation [
> >>     a ex:AbbreviationRelation;
> >>     ex:abbreviatedForm "Corp."@en;
> >>     ex:fullForm "Corporation"@en;
> >>   ].
> >>
> >> --- End Turtle ---
> >>
> >>  - Inconsistent Examples: 
> >>
> >> None possible.
> >>
> >>  - Entailment Rules
> >>
> >> None.
> >>
> >>  - Justification
> >>
> >> This proposal provides a general, extendable, framework 
> for asserting
> >> n-ary relationsips between zero or more literals and zero or more
> >> concepts. The commitment is minimal, whilst still 
> retaining consistent
> >> expectations with respect to the domains and ranges of properties
> >> involved.
> >>
> >> Cheers,
> >>
> >> Alistair. 
> >>
> >>
> >> [1] http://lists.w3.org/Archives/Public/public-swd-wg/2007Feb/0181
> >> [2] 
> >> http://lists.w3.org/Archives/Public/public-swd-wg/2007Feb/0195.html
> >>
> >> --
> >> Alistair Miles
> >> Research Associate
> >> CCLRC - Rutherford Appleton Laboratory
> >> Building R1 Room 1.60
> >> Fermi Avenue
> >> Chilton
> >> Didcot
> >> Oxfordshire OX11 0QX
> >> United Kingdom
> >> Web: http://purl.org/net/aliman
> >> Email: a.j.miles@rl.ac.uk
> >> Tel: +44 (0)1235 445440  
> >>
> >>> -----Original Message-----
> >>> From: public-swd-wg-request@w3.org 
> >>> [mailto:public-swd-wg-request@w3.org] On Behalf Of Guus Schreiber
> >>> Sent: 27 February 2007 11:43
> >>> To: SWD WG
> >>> Subject: [SKOS] Proposed Resolution for ISSUE 26: 
> >>> RelationshipBetweenLabels
> >>>
> >>>
> >>> 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/RelationshipsBet
> >>> weenLabels
> >>> [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/
> >>>
> >>>
> >>
> > 
> > 
> > 
> > --
> > Alistair Miles
> > Research Associate
> > CCLRC - Rutherford Appleton Laboratory
> > Building R1 Room 1.60
> > Fermi Avenue
> > Chilton
> > Didcot
> > Oxfordshire OX11 0QX
> > United Kingdom
> > Web: http://purl.org/net/aliman
> > Email: a.j.miles@rl.ac.uk
> > Tel: +44 (0)1235 445440  
> > 
> 
> -- 
>   Mark F.J. van Assem - Vrije Universiteit Amsterdam
>         markREMOVE@cs.vu.nl - http://www.cs.vu.nl/~mark
> 
Received on Tuesday, 20 March 2007 12:28:18 GMT

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