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Re: Is it best practices to use a rdfs:seeAlso link to a potentially multimegabyte PDF?, existing predicate for linking to PDF?

From: Tim Berners-Lee <timbl@w3.org>
Date: Fri, 7 Jan 2011 11:47:45 -0500
Cc: public-lod@w3.org
Message-Id: <C1831EE5-4F39-449D-81B4-D7D0DD4653B6@w3.org>
To: Peter DeVries <pete.devries@gmail.com>
Certainly. the tabulator follows rdfs:seeAlso and expects some terse RDF.
and so would be crippled by any large file, and PDF would not of course help it at all.
I take seeAlso as a fairly strong request to see the other thing, like an HTTP redirect.
Not a generic "this is vaguely related" link at all, and not in general to point to human-readable stuff.

Tim


On 2011-01 -06, at 14:40, 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
> ------------------------------------------------------------
Received on Saturday, 8 January 2011 12:18:31 UTC

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