<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Tim Berners-Lee</b> <span dir="ltr"><<a href="mailto:timbl@w3.org">timbl@w3.org</a>></span><br>Date: Fri, Jan 7, 2011 at 10:47 AM<br>
Subject: Re: Is it best practices to use a rdfs:seeAlso link to a potentially multimegabyte PDF?, existing predicate for linking to PDF?<br>To: Peter DeVries <<a href="mailto:pete.devries@gmail.com">pete.devries@gmail.com</a>><br>
Cc: <a href="mailto:public-lod@w3.org">public-lod@w3.org</a><br><br><br><div style="word-wrap:break-word">Certainly. the tabulator follows rdfs:seeAlso and expects some terse RDF.<div>and so would be crippled by any large file, and PDF would not of course help it at all.</div>
<div>I take seeAlso as a fairly strong request to see the other thing, like an HTTP redirect.</div><div>Not a generic "this is vaguely related" link at all, and not in general to point to human-readable stuff.</div>
<div><br></div><font color="#888888"><div>Tim</div></font><div><div></div><div class="h5"><div><br><div><br><div><div>On 2011-01 -06, at 14:40, Peter DeVries wrote:</div><br><blockquote type="cite">I was wondering if there is an existing predicate for linking to a PDF file?<div>
<br></div><div>I would like to incorporate a link between bibliographic reference description and a URL to the location of a PDF of that document.<br clear="all">
</div><div>I had minted a predicate txn:hasPDFVersion, as demonstrated in this RDF snippet. (Part of <a href="http://lod.taxonconcept.org/ses/v6n7p.rdf" target="_blank">http://lod.taxonconcept.org/ses/v6n7p.rdf</a> )</div>
<div><br></div>
<div><div><font face="'courier new', monospace" size="1"> <txn:SpeciesOriginalDescription rdf:about="<a href="http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription" target="_blank">http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription</a>"></font></div>
<div><font face="'courier new', monospace" size="1"> <!-- Ideally, this should link to a resource in the Biodiversity Heritage Library --></font></div><div><font face="'courier new', monospace" size="1"> <dcterms:title>Original Published Description relating to Species Concept Puma concolor se:v6n7p</dcterms:title></font></div>
<div><font face="'courier new', monospace" size="1"> <dcterms:identifier><a href="http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription" target="_blank">http://lod.taxonconcept.org/ses/v6n7p#OriginalDescription</a></dcterms:identifier></font></div>
<div><font face="'courier new', monospace" size="1"> <dcterms:description>LOD metadata about the original species description relating to Species Concept Puma concolor se:v6n7p</dcterms:description></font></div>
<div><font face="'courier new', monospace" size="1"> <dcterms:isPartOf rdf:resource="<a href="http://lod.taxonconcept.org/ses/v6n7p#Species" target="_blank">http://lod.taxonconcept.org/ses/v6n7p#Species</a>"/></font></div>
<div><font face="'courier new', monospace" size="1"> <txn:hasAuthorURI rdf:resource="<a href="http://dbpedia.org/resource/Carl_Linnaeus" target="_blank">http://dbpedia.org/resource/Carl_Linnaeus</a>"/></font></div>
<div><font face="'courier new', monospace" size="1"> <txn:hasBasionymName>Felis concolor Linnaeus 1771</txn:hasBasionymName></font></div><div><font face="'courier new', monospace" size="1"> <txn:year>1771</txn:year></font></div>
<div><font face="'courier new', monospace" size="1"> <txn:hasPDFVersion rdf:resource="<a href="http://assets.geospecies.org/spec_concept_uuid/603bebac-cc44-4168-bbf7-b11b976f9d79/Felis_concolor_Linnaeus_1771.pdf" target="_blank">http://assets.geospecies.org/spec_concept_uuid/603bebac-cc44-4168-bbf7-b11b976f9d79/Felis_concolor_Linnaeus_1771.pdf</a>"/></font></div>
<div><font face="'courier new', monospace" size="1"> <txn:speciesOriginalDescriptionHasSpeciesConcept rdf:resource="<a href="http://lod.taxonconcept.org/ses/v6n7p#Species" target="_blank">http://lod.taxonconcept.org/ses/v6n7p#Species</a>"/></font></div>
<div><font face="'courier new', monospace" size="1"> <!-- There should be a type specimen. Add link to GBIF via 'txn:sodHasTypeSpecimen' if they know about it. --></font></div>
<div><font face="'courier new', monospace" size="1"> <wdrs:describedBy rdf:resource="<a href="http://lod.taxonconcept.org/ses/v6n7p.rdf" target="_blank">http://lod.taxonconcept.org/ses/v6n7p.rdf</a>"/></font></div>
<div><font face="'courier new', monospace" size="1"> </txn:SpeciesOriginalDescription></font></div><div><br></div> 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.</div>
<div><br></div><div>In summary, I think it would be useful to have a predicate that can be used for linking specifically to a PDF document.</div><div><br></div><div>Is there an existing predicate for this?</div><div><br>
</div>
<div>What do people think about the suggestion to use rdfs:seeAlso to link to a PDF?</div><div><br></div><div>I would also like to know of others thoughts or suggestions regarding this issue,</div><div><br></div><div>Respectfully,</div>
<div><br></div><div>- Pete</div><div><br></div><div><br></div><div><br>---------------------------------------------------------------<br>Pete DeVries<br>Department of Entomology<br>University of Wisconsin - Madison<br>445 Russell Laboratories<br>
1630 Linden Drive<br>Madison, WI 53706<br><a href="http://www.taxonconcept.org/" target="_blank">TaxonConcept Knowledge Base</a> / <a href="http://lod.geospecies.org/" target="_blank">GeoSpecies Knowledge Base</a><br><a href="http://about.geospecies.org/" target="_blank">About the GeoSpecies Knowledge Base</a><br>
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</div>
</blockquote></div><br></div></div></div></div></div></div><br><br clear="all"><br>-- <br>---------------------------------------------------------------<br>Pete DeVries<br>Department of Entomology<br>University of Wisconsin - Madison<br>
445 Russell Laboratories<br>1630 Linden Drive<br>Madison, WI 53706<br><a href="http://www.taxonconcept.org/" target="_blank">TaxonConcept Knowledge Base</a> / <a href="http://lod.geospecies.org/" target="_blank">GeoSpecies Knowledge Base</a><br>
<a href="http://about.geospecies.org/" target="_blank">About the GeoSpecies Knowledge Base</a><br>------------------------------------------------------------<br>