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RE: Semantic relation BroaderPartitive/ NarrowerPartitiv

From: Miles, AJ \(Alistair\) <A.J.Miles@rl.ac.uk>
Date: Thu, 18 Oct 2007 17:36:23 +0100
Message-ID: <677CE4DD24B12C4B9FA138534E29FB1D0363BDDA@exchange11.fed.cclrc.ac.uk>
To: "Dichev, Christo" <dichevc@wssu.edu>, <public-swd-wg@w3.org>

Thanks Christo, this is useful input. We're working our way towards the issues where this input will be very relevant.

Cheers,

Alistair.

--
Alistair Miles
Research Associate
Science and Technology Facilities Council
Rutherford Appleton Laboratory
Harwell Science and Innovation Campus
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 Dichev, Christo
> Sent: 15 October 2007 19:43
> To: public-swd-wg@w3.org
> Subject: RE: Semantic relation BroaderPartitive/ NarrowerPartitiv
> 
> Hi,
> 
> The Topic Maps to RDF conversion as a part of the TM4L 
> project, announced in my previous mail was completed 
> recently. Our conversion strategy (among many others) was 
> aimed at maximum reuse of the RDF vocabulary which also 
> impacts the expressivity of some aspects of Topic Maps 
> concepts. For example the predefined (in TM4L) Topic Map 
> associations such as Instance-Of and Superclass-Subclass are 
> mapped to  rdf:type and rdfs:subClassOf. For the predefined 
> Whole-Part and Related association we wanted to  provide 
> mapping to skos:narrowerPartitive and skos:related. Since we 
> have not received any response to my previous  email to this 
> list we decided to convert them to normal  RDF properties.  
> However using the skos vocabulary (the same way we use dc 
> vocabulary) is still in our agenda. 
> 
> Your feedback on this mater will be appreciated.
> 
> Below is the original announcement sent to various semantic 
> web and Topic Maps mailing lists regarding the new release of 
> TM4L supporting  conversion between Topic Maps and RDF.
> 
> Christo
> 
> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
> = = = = = = = = = = = = = = = = = = = = = = = = = = = = == = 
> = = = = = = = = = = = = = = = = = = = 
> 
> A new version of the TM4L Editor, based on TMAPI, is now 
> available. TM4L is an e-learning environment providing 
> authoring and browsing support for creating ontology-based 
> learning content and/or structuring digital repositories. 
> TM4L utilizes topic map-based overlay structures that encode 
> domain knowledge and connect it to (learning) resources, 
> which are considered relevant to a specific domain. Its 
> interface is translated into 9 languages including Spanish, 
> German, French, Chinese (Traditional and Simplified), 
> Japanese, Danish, Bulgarian, and Nepali.
> 
> The features added recently to TM4L include:
> 
> - conversion between Topic Maps and RDF data
> 
> - plug-in architecture enabling users to add new features
> 
> - topic map querying capabilities
> 
> - visual topic maps editing
> 
>   + more ...
> 
> The latest version of TM4L can be downloaded from
> 
>        http://compsci.wssu.edu/iis/nsdl/download.html 
> <http://compsci.wssu.edu/iis/nsdl/download.html>  
> 
> As always your feedback is appreciated! 
> 
> Cheers,
> 
> Christo
> 
> _____________________________________________
> From: Dichev, Christo
> Sent: Thursday, June 28, 2007 7:39 PM
> To: public-swd-wg@w3.org
> Subject: Semantic relation BroaderPartitive/ NarrowerPartitiv
> 
> 
> Hi,
> 
> We are in a process of implementing Topic Maps to RDF mapping 
> this summer as a plug-in to our TM4L editor  
> (http://compsci.wssu.edu/iis/nsdl/download.html 
> <http://compsci.wssu.edu/iis/nsdl/download.html> ) TM4L 
> supports four predefined associations: Type-Instance, 
> Superclass-Subclass, Whole-Part and Related. In this mapping 
> project we try to use well recognized vocabularies. There is 
> a pretty good match between the TM4L predefined associations 
> and the SKOS basic semantic relations. One of my concerns is 
> the semantic relation BroaderPartitive/ NarrowerPartitive. At 
> the end of the last week I wrote a private email to Alistair 
> to share my concern (see below). He responded to my question 
> and concerns but also advised me to report the problem to 
> (public-swd-wg@w3.org <mailto:public-swd-wg@w3.org> ). 
> 
> I think that partitive relations are very important in 
> classifying and organizing the world important not to be 
> addressed. For example, in learning context,  concepts are 
> typically organized in a class-subclass taxonomy. However in 
> terms of learning collections they are organized into 
> chapter-subchapters, sections-subsections, also into 
> Spring-2007, Fall-2007,... etc. This is just one example of a 
> general relation with significant practical implications: any 
> composite item is defined in terms of part-whole, even basic 
> elements like molecules-atoms-electrons.
> 
> I am aware of the problems with part-hole. However I feel 
> that some restricted version(s) should be included in SKOS. 
> It is better to have a few standard definitions rather than 
> unpredictable amount of user specifications.
> 
> For example I would prefer to map 
> 
>             Topic1              --> whole-part     --> Topic2
> 
>                                  *
> 
>           Topic1            --> skos:narrowerPartitive      
> -->  Topic2
> 
>  Instead of using something like the following:
> 
> 
> <owl:TransitiveProperty rdf:about=" 
> http://purl.org/dc/terms/isPartOf"/ 
> <http://purl.org/dc/terms/isPartOf> >
> 
>     <owl:inverseOf rdf:resource=" 
> http://purl.org/dc/terms/hasPart <http://purl.org/dc/terms/hasPart> ">
> 
>     <rdfs:range rdf:resource="http://www.w3.org/2002/07/owl#Thing"/>
> 
>     <rdf:type 
> rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
> 
>   </owl:TransitiveProperty>
> 
>             Topic1              --> whole-part     --> Topic2
> 
>                                   *
> 
>               Topic2            --> isPartOf       -->  Topic1
> 
> 
> Cheers,
> 
> Christo
> 
> 
> ============================================
> 
> Hi Christo,
> 
> Thanks for letting me know about this. The semantic relation 
> extensions such as broaderPartitive have always been part of 
> a "SKOS Extensions" vocabulary, which is where we put stuff 
> we weren't sure about at the time of publishing the current 
> drafts, see:
> 
> [1] <http://www.w3.org/2004/02/skos/extensions/spec/ 
> <http://www.w3.org/2004/02/skos/extensions/spec/> >
> 
> We haven't yet talked about whether these will become part of 
> the normative specification of SKOS when we develop the W3C 
> recommendation, or whether these will be published as an 
> informative "Note", or whether they'll be published at all. 
> So there's no problem with you using them, but there's no 
> guarantee they'll be part of the final SKOS recommendation.
> 
> To give you an idea of where we're at, the Semantic Web 
> Deployment WG has just published the first draft of the SKOS 
> Use Cases and Requirements [2], and is starting to address 
> some of the main issues [3] (such as interoperability with OWL etc.).
> 
> If it's important that SKOS support specific semantic 
> relation extensions, then it would be really helpful if you 
> could send an email to public-swd-wg@w3.org with some basic 
> information about your requirements and your use case - this 
> would give us a basis for raising an issue, which would put 
> it on our agenda.
> 
> Cheers,
> 
> Alistair.
> 
> 
> [2] <http://www.w3.org/TR/2007/WD-skos-ucr-20070516/ 
> <http://www.w3.org/TR/2007/WD-skos-ucr-20070516/> >
> 
> [3] <http://www.w3.org/2006/07/SWD/track/issues 
> <http://www.w3.org/2006/07/SWD/track/issues> >
> 
> --
> 
> Alistair Miles
> 
> Research Associate
> 
> Science and Technology Facilities Council Rutherford Appleton 
> Laboratory Harwell Science and Innovation Campus Didcot 
> Oxfordshire OX11 0QX United Kingdom
> 
> Web: http://purl.org/net/aliman <http://purl.org/net/aliman> 
> 
> Email: a.j.miles@rl.ac.uk
> 
> Tel: +44 (0)1235 445440  
> 
> > -----Original Message-----
> 
> > From: Dichev, Christo [mailto:dichevc@wssu.edu 
> > <mailto:dichevc@wssu.edu> ]
> 
> > Sent: 23 June 2007 00:09
> 
> > To: Miles, AJ (Alistair)
> 
> > Subject: SKOS partitive relations
> 
> > 
> 
> > Hi Alistair,
> 
> > 
> 
> > We are in a process of implementing Topic Maps to RDF mapping this
> 
> > summer as a plug-in to our TM4L editor
> 
> > (http://compsci.wssu.edu/iis/nsdl/download.html 
> > <http://compsci.wssu.edu/iis/nsdl/download.html>
> 
> > <http://compsci.wssu.edu/iis/nsdl/download.html 
> > <http://compsci.wssu.edu/iis/nsdl/download.html> > ). We 
> intended to 
> > use
> 
> > the SKOS vocabulary for mapping the TM4L built-in 
> association such as
> 
> > Superclass-Subclass, Related-to and Whole-Part. From the SKOS  Core
> 
> > Guide that I printed a couple of years ago I remember that
> 
> > BroaderPartitive / NarrowerPartitive were included in the proposal. 
> 
> > But now it seems that this taxonomic relationship is missing in the
> 
> > last version.
> 
> > 
> 
> > I would appreciate your comment on this issue since it affects our
> 
> > mapping decisions.
> 
> > 
> 
> > Christo
> 
> > 
> 
> > 
> 
> 
> 
> 
Received on Thursday, 18 October 2007 16:36:39 GMT

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