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

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



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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 <http://www.taxonconcept.org/> / GeoSpecies
Knowledge Base <http://lod.geospecies.org/>
About the GeoSpecies Knowledge Base <http://about.geospecies.org/>
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