[open-bibliography] New BNB sample data available

[Owen Stephens]

Just check I'm reading this correctly

The problem arises because the BL is essentially trying to say which of the
SKOS preflabels the BL prefers? Presumably  "for display purposes you should
use this label" (or something like that)?

Corine - are you able to clarify?

Owen

On Thu, Feb 3, 2011 at 9:38 PM, Antoine Isaac <aisaac at few.vu.nl> wrote:

> Hi Andrew,
>
>
>
>  From: public-lld-request at w3.org [mailto:public-lld-request at w3.org] On
>>> Behalf Of Antoine Isaac
>>> Sent: Thursday, February 03, 2011 13:54
>>> To: open-bibliography at lists.okfn.org; public-lld
>>> Subject: Re: New BNB sample data available
>>>
>>>      <dcterms:subject>
>>>        <rdf:Description>
>>>          <skos:inScheme
>>> rdf:resource="http://id.loc.gov/authorities#conceptScheme" />
>>>          <skos:prefLabel>Görner, Rüdiger--Travel--England--
>>> London.</skos:prefLabel>
>>>          <rdf:type
>>> rdf:resource="http://www.w3.org/2004/02/skos/core#Concept" />
>>>        </rdf:Description>
>>>      </dcterms:subject>
>>>
>>>      <dcterms:subject>
>>>        <rdf:Description
>>> rdf:about="http://id.loc.gov/authorities/sh2008107012#concept">
>>>          <skos:inScheme
>>> rdf:resource="http://id.loc.gov/authorities#conceptScheme" />
>>>          <skos:prefLabel>Literary landmarks--England--
>>> London.</skos:prefLabel>
>>>          <rdf:type
>>> rdf:resource="http://www.w3.org/2004/02/skos/core#Concept" />
>>>        </rdf:Description>
>>>      </dcterms:subject>
>>>
>>> So I understand why you define "on-the-fly" (and "in-the-data") the
>>> concepts that you can't find in the LCSH linked data. And I think this
>>> is a reasonable solution.
>>>
>>
>> There is an issue with the way the RDF is specified IMHO and you have to
>> read the SKOS specification to understand the implications of the above
>> RDF:
>>
>>   <http://www.w3.org/TR/skos-reference/#L1567>
>>
>> S13 skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise
>> disjoint properties.
>> S14 A resource has no more than one value of skos:prefLabel per language
>> tag.
>>
>> If LC declares:
>>
>> @BASE<http://id.loc.gov/authorities/>
>> <sh2008107012#concept>  skos:prefLabel "Literary
>> landmarks--England--London."
>>
>> and the above RDF declares the same, then the integrity constraint S13 and
>> S14 are
>> violated because there now exists two triples in the combined graph of
>> resources
>> that say the same thing, thus S13 is violated because of the pairwise
>> disjoint
>> constraint and S14 is violated because there is more than one
>> skos:prefLabel per
>> language.
>>
>> If you want to do something like this then IMHO use rdfs:label instead of
>> skos:prefLabel to get around integrity constraints S13 and S14.
>>
>>
>
> A quite note, related to my comment on the data served by BL being
> potentially different from the one at id.loc.gov. The data above has:
>
> <skos:prefLabel>Literary landmarks--England--London.</skos:prefLabel>
> And id.loc.gov has
> <skos:prefLabel xml:lang="en">Literary
> landmarks--England--London</skos:prefLabel>
> Because of BL not committing to a specific literal language tag, S14 is in
> fact not violated: interesting side effect ;-)
> But I agree, the best would be that BL publishes exactly the same prefLabel
> as id.loc.gov. That would ensure that there's never any issue!
>
> As I said, I think that the "option" to serve concept data like this is
> reasonable only when these concepts are not already present on id.loc.gov.
> Otherwise it could raise quite many problems...
>
> Best,
>
> Antoine
>
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-- 
Owen Stephens
Owen Stephens Consulting
Web: http://www.ostephens.com
Email: owen at ostephens.com
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