I thought that I would run the PDF question past the some lod experts.

Here is the first reply

- Pete

---------- Forwarded message ----------
From: Hugh Glaser <hg@ecs.soton.ac.uk>
Date: Thu, Jan 6, 2011 at 2:44 PM
Subject: Re: Is it best practices to use a rdfs:seeAlso link to a potentially multimegabyte PDF?, existing predicate for linking to PDF?
To: Peter DeVries <pete.devries@gmail.com>
Cc: "<public-lod@w3.org>" <public-lod@w3.org>


I see that Chris Gutteridge uses dc:hasPart for the ePrints RDF (eprints.org).
Eg:

<http://eprints.ecs.soton.ac.uk/21681/>
       dc:format "text/html";
       dc:title "HTML Summary of #21681 Consuming multiple linked data sources: Challenges and Experiences";
       foaf:primaryTopic <http://eprints.ecs.soton.ac.uk/id/eprint/21681> .
...
<http://eprints.ecs.soton.ac.uk/id/eprint/21681>
       ep:hasDocument <http://eprints.ecs.soton.ac.uk/id/document/36430>,
...
<http://eprints.ecs.soton.ac.uk/id/document/36430>
       dct:hasPart <http://eprints.ecs.soton.ac.uk/21681/1/cold2010%2Dpaper16%2Dcamera%2Dready.pdf>;
...

Cheers
Hugh

On 6 Jan 2011, at 19:40, Peter DeVries wrote:

> I was wondering if there is an existing predicate for linking to a PDF file?
>
> I would like to incorporate a link between bibliographic reference description and a URL to the location of a PDF of that document.
>
> I had minted a predicate txn:hasPDFVersion, as demonstrated in this RDF snippet. (Part of http://lod.taxonconcept.org/ses/v6n7p.rdf )
>
>   <txn:SpeciesOriginalDescription rdf:about="http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription">
>     <!-- Ideally, this should link to a resource in the Biodiversity Heritage Library -->
>     <dcterms:title>Original Published Description relating to Species Concept Puma concolor se:v6n7p</dcterms:title>
>     <dcterms:identifier>http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription</dcterms:identifier>
>     <dcterms:description>LOD metadata about the original species description relating to Species Concept Puma concolor se:v6n7p</dcterms:description>
>     <dcterms:isPartOf rdf:resource="http://lod.taxonconcept.org/ses/v6n7p#Species"/>
>     <txn:hasAuthorURI rdf:resource="http://dbpedia.org/resource/Carl_Linnaeus"/>
>     <txn:hasBasionymName>Felis concolor Linnaeus 1771</txn:hasBasionymName>
>     <txn:year>1771</txn:year>
>     <txn:hasPDFVersion rdf:resource="http://assets.geospecies.org/spec_concept_uuid/603bebac-cc44-4168-bbf7-b11b976f9d79/Felis_concolor_Linnaeus_1771.pdf"/>
>     <txn:speciesOriginalDescriptionHasSpeciesConcept rdf:resource="http://lod.taxonconcept.org/ses/v6n7p#Species"/>
>     <!-- There should be a type specimen. Add link to GBIF via 'txn:sodHasTypeSpecimen' if they know about it. -->
>     <wdrs:describedBy rdf:resource="http://lod.taxonconcept.org/ses/v6n7p.rdf"/>
>   </txn:SpeciesOriginalDescription>
>
> Some have suggested using rdfs:seeAlso to link to what could be a multimegabyte PDF, but I think this would cause problems for a number of RDF crawlers like Elmo.
>
> In summary, I think it would be useful to have a predicate that can be used for linking specifically to a PDF document.
>
> Is there an existing predicate for this?
>
> What do people think about the suggestion to use rdfs:seeAlso to link to a PDF?
>
> I would also like to know of others thoughts or suggestions regarding this issue,
>
> Respectfully,
>
> - Pete
>
>
>
> ---------------------------------------------------------------
> Pete DeVries
> Department of Entomology
> University of Wisconsin - Madison
> 445 Russell Laboratories
> 1630 Linden Drive
> Madison, WI 53706
> TaxonConcept Knowledge Base / GeoSpecies Knowledge Base
> About the GeoSpecies Knowledge Base
> ------------------------------------------------------------

--
Hugh Glaser,
             Intelligence, Agents, Multimedia
             School of Electronics and Computer Science,
             University of Southampton,
             Southampton SO17 1BJ
Work: +44 23 8059 3670, Fax: +44 23 8059 3045
Mobile: +44 78 9422 3822, Home: +44 23 8061 5652
http://www.ecs.soton.ac.uk/~hg/





--
---------------------------------------------------------------
Pete DeVries
Department of Entomology
University of Wisconsin - Madison
445 Russell Laboratories
1630 Linden Drive
Madison, WI 53706
TaxonConcept Knowledge Base / GeoSpecies Knowledge Base
About the GeoSpecies Knowledge Base
------------------------------------------------------------