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Re: pre-coordination

From: Stella Dextre Clarke <stella@lukehouse.org>
Date: Tue, 02 Nov 2010 18:22:10 +0000
Message-ID: <4CD056D2.6040101@lukehouse.org>
To: Cory Rockliff <rockliff@bgc.bard.edu>, "Ray Denenberg, Library of Congress" <rden@loc.gov>
CC: Antoine Isaac <aisaac@few.vu.nl>, public-lld@w3.org, SKOS <public-esw-thes@w3.org>
Ray/Cory,
You might be interested to look at BS 8723-4*, which deals with mapping 
between a subject headings scheme (and  specifically discusses 
pre-coordinated strings of headings) and a thesaurus. It recommends the 
way to express such mappings for human comprehensibility - but of course 
it cannot pronounce on how to convert them to SKOS, since SKOS does not 
currently provide for compound equivalence mappings. (Which is a big 
omission in my view; it would be good if resources could be found for 
some extension work.)
You may also like to know that the forthcoming standard ISO 25964 will 
discuss this subject too, improving on the BS 8723 recommendations.
Contact any national standards body (e.g. NISO, BSI or DIN) to purchase 
copies of BS 8723, and in due course ISO 25964. (Sorry about the price tag.)
Regards
Stella Dextre Clarke


*British Standards Institution. BS 8723-4:2007 Structured vocabularies 
for information retrieval - Guide - Interoperability between 
vocabularies. British Standards Institution: London, 2007. 62pp

-- 
*****************************************************
Stella Dextre Clarke
Information Consultant
Luke House, West Hendred, Wantage, OX12 8RR, UK
Tel: 01235-833-298
Fax: 01235-863-298
stella@lukehouse.org
*****************************************************
On 02/11/2010 10:43, Antoine Isaac wrote:
> [Just forwarding this thread to the SKOS list, on which more people may
> want to react on this]
>
>
>> From your example, it sounds like every pre-coordinated "heading" gets
>> its own authority description, as do its individual components. If
>> this were done programmatically with LCSH, wouldn't the result be
>> loads of syntactically "valid" but nonsensical combinations?
>>
>> Re: MADS RDF, is there anything to read/look at right now, or should I
>> sit on my hands for a week or two?
>>
>> Cory
>>
>> On 11/1/10 4:57 PM, Ray Denenberg, Library of Congress wrote:
>>> Quote: "Can anyone point me to research or implementations around the
>>> question of subject pre-coordination in a linked data context? It
>>> seems to
>>> me that this is still the elephant in the room when it comes to
>>> dealing with
>>> LCSH in a meaningful way."
>>>
>>> The XG use case 'Component Vocabularies',
>>> http://www.w3.org/2005/Incubator/lld/wiki/Use_Case_Component_Vocabularies,
>>>
>>> deals specifically with this; its name (the "component" part) was
>>> chosen to
>>> emphasize the pre-coordination aspect.
>>>
>>> For example consider the (hypothetical) LCSH subject heading
>>> "Sailboats --
>>> Design and construction". A bibliographic description for a book about
>>> sailboats might cite this subject heading and link to its authority
>>> description in MADS/RDF, which in turn will link to the individual
>>> component
>>> subject headings, "sailboats" and "Design and Construction".
>>>
>>> The MADS RDF work, which has been developed over the past year or so,
>>> provides the necessary granularity to understand the components of the
>>> heading; a MADS/RDF ontology is expected to be available for public
>>> review
>>> within the next week or two.
>> ---
>> [This E-mail scanned for viruses by Declude Virus]
>>
>>
>>
>>> From the SKOS Primer:
>>
>> "Rather than commit to a design pattern that has not been proven
>> useful, the Semantic Web Deployment Group decided to postpone the
>> issue of coordination, to allow extension patterns to organically
>> emerge as SKOS is deployed. The hope is that as successful patterns
>> are established, they can be published on the Web as an extension
>> vocabulary to SKOS and documented as a W3C Note or some equivalent."
>>
>> Have there been any recent developments in this area? Can anyone point
>> me to research or implementations around the question of subject
>> pre-coordination in a linked data context? It seems to me that this is
>> still the elephant in the room when it comes to dealing with LCSH in a
>> meaningful way.
>>
>> Of particular interest to me is the question of how to express
>> one-to-many or many-to-many matches between SKOS concepts. So, e.g.,
>> mapping between pre-coordinated LCSH and post-coordinated AAT & TGN:
>>
>> LCSH topical "gilt furniture" = AAT Activities "gilt" + AAT Objects
>> "furniture"
>> LCSH topical "Leatherwork--Alaska" = LCSH topical "Leatherwork" + NAF
>> "Alaska" = AAT Activities "leatherworking" + TGN "Alaska"
>>
>> Thanks,
>>
>> Cory
>
>
>
Received on Tuesday, 2 November 2010 18:22:35 GMT

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