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.p...

;

...

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%22%3E

<!-- 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%22/%3E

<txn:hasAuthorURI rdf:resource="

http://dbpedia.org/resource/Carl_Linnaeus%22/%3E

<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-b11b9... "/>

<txn:speciesOriginalDescriptionHasSpeciesConcept rdf:resource="

http://lod.taxonconcept.org/ses/v6n7p#Species%22/%3E

<!-- 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%22/%3E

</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

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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

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-- 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/