Re: Top three levels of Dewey Decimal Classification published as linked data

Hi Michael,

This is really exciting news, especially for those of us Linked Data
enthusiasts in the world of libraries and archives. Congratulations!

I haven't fully read the wiki page yet, so I apologize if this
question is already answered there. I was wondering why you chose to
mint multiple URIs for the same concept in different languages. For
example:

uqbar:~ ed$ rapper -o turtle http://dewey.info/class/641/

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xhtml: <http://www.w3.org/1999/xhtml/vocab#> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://dewey.info/class/641/2009/08/about.en>
    cc:attributionName "OCLC Online Computer Library Center, Inc." ;
    cc:attributionURL <http://www.oclc.org/dewey/> ;
    cc:morePermissions <http://www.oclc.org/dewey/about/licensing/> ;
    dct:isVersionOf <http://dewey.info/class/641/> ;
    dct:language "en"^^dct:RFC4646 ;
    a skos:Concept ;
    xhtml:license <http://creativecommons.org/licenses/by-nc-nd/3.0/> ;
    skos:broader <http://dewey.info/class/64/2009/08/about.en> ;
    skos:inScheme <http://dewey.info/scheme/2009/08/about.en> ;
    skos:notation "641"^^<http://dewey.info/schema-terms/Notation> ;

<http://dewey.info/class/641/2003/08/about.de>
    cc:attributionName "OCLC Online Computer Library Center, Inc." ;
    cc:attributionURL <http://www.oclc.org/dewey/> ;
    cc:morePermissions <http://www.oclc.org/dewey/about/licensing/> ;
    dct:isVersionOf <http://dewey.info/class/641/> ;
    dct:language "de"^^dct:RFC4646 ;
    a skos:Concept ;
    xhtml:license <http://creativecommons.org/licenses/by-nc-nd/3.0/> ;
    skos:broader <http://dewey.info/class/64/2003/08/about.de> ;
    skos:inScheme <http://dewey.info/scheme/2003/08/about.de> ;
    skos:notation "641"^^<http://dewey.info/schema-terms/Notation> ;
    skos:prefLabel "Essen und Trinken"@de .

...

I kind of expected the assertions to hang off of a language and
version agnostic URI, with perhaps dct:hasVersion links to previous
versions.

<http://dewey.info/class/641/>
    cc:attributionName "OCLC Online Computer Library Center, Inc." ;
    cc:attributionURL <http://www.oclc.org/dewey/> ;
    cc:morePermissions <http://www.oclc.org/dewey/about/licensing/> ;
    dct:hasVersion <http://dewey.info/class/641/2009/08/> ;
    dct:language "de"^^dct:RFC4646 ;
    a skos:Concept ;
    xhtml:license <http://creativecommons.org/licenses/by-nc-nd/3.0/> ;
    skos:broader <http://dewey.info/class/64/2003/08/about.de> ;
    skos:inScheme <http://dewey.info/scheme/2003/08/about.de> ;
    skos:notation "641"^^<http://dewey.info/schema-terms/Notation> ;
    skos:prefLabel "Food & drink"@en, "Essen und Trinken"@de .

See how multiple skos:prefLabel assertions can be made using the same
subject? To illustrate why I think this is important consider how
someone may use the resources at dewey.info:

    <http://openlibrary.org/b/OL11604988M> dct:subject
<http://dewey.info/class/641/> .

If we follow our nose to http://dewey.info/class/641 we will get back
some RDF, but the description we get isn't about the subject
<http://dewey.info/class/641/> so what are we to make of the above
assertion?

Another unrelated thing I noticed is that the RDFa doesn't seem to be
usable by the RDFa Distiller:

    http://tinyurl.com/nm8lfa

Sorry if this was too long. Let me just say again how exciting it is
to see this work coming out of OCLC.

//Ed

Received on Thursday, 20 August 2009 00:11:30 UTC