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The ontology document shouldn't 404s, but either way I'm pretty sure that all the vocabulary terms defined there are obsolete (e.g. viaf:NameAuthorityCluster). The diagram referenced in the 2011-04 Outgoing blog post is still current: http://outgoing.typepad.com/.a/6a00d83459bf2269e20147e410996d970b-popup This document from the W3C LLD XG use case gathering phase may also provide some extra historical context from around that time: http://www.w3.org/2005/Incubator/lld/wiki/Use_Case_Virtual_International_Authority_File_%28VIAF%29 The SKOS-XL vocabulary was used early on, but was eventually factored out in favor of straight SKOS. The reference to xmlns:skos-xl is vestigial. Jeff From: Richard Wallis [mailto:[log in to unmask]] Sent: Monday, April 07, 2014 11:26 PM To: Code for Libraries Subject: Re: [CODE4LIB] viaf You are correct that in the xmlns namespace definitions in the xml <http://viaf.org/viaf/231063554/rdf.xml> references a namespace that is no longer used in the output. There is a single commented out reference to 'viaf:NameAuthorityCluster' in the output. This post covers the change that deprecated the use of this: http://outgoing.typepad.com/outgoing/2011/04/changes-to-viafs-rdf.html From the other xmlns definitions it can be seen that use is made of void, owl, foaf, skis-xl, skis, RDA ElementsGR2, FRBRentitiesRDA to describe VIAF resources. I'll pass this on to some of the team behind VIAF to see if they have further comment ~Richard. On 7 April 2014 23:04, Eric Lease Morgan <[log in to unmask]<mailto:[log in to unmask]>> wrote: On Apr 7, 2014, at 10:52 PM, Richard Wallis <[log in to unmask]<mailto:[log in to unmask]>> wrote: > Is this what you are looking for: http://viaf.org/viaf/data/ Alas, no, not really. I'm looking for an RDF file listing the classes and properties used by VIAF. VIAF can return RDF for specific entities, as in curl: curl -L -H "accept: application/rdf+xml" http://viaf.org/viaf/231063554/ Upon what RDF schema is this output based? The "header" of the output alludes to the following URI, but it returns an error: http://viaf.org/ontology/1.1/#<http://viaf.org/ontology/1.1/> - Eric Morgan -- Richard Wallis Founder, Data Liberate http://dataliberate.com Tel: +44 (0)7767 886 005 Linkedin: http://www.linkedin.com/in/richardwallis Skype: richard.wallis1 Twitter: @rjw