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RE: Publication types in RDF with RDA

From: Young,Jeff (OR) <jyoung@oclc.org>
Date: Thu, 7 Apr 2011 11:05:54 -0400
Message-ID: <52E301F960B30049ADEFBCCF1CCAEF590C0B5621@OAEXCH4SERVER.oa.oclc.org>
To: "Jakob Voss" <jakob.voss@gbv.de>, "public-lld" <public-lld@w3.org>
Jakob Voss wrote:
> Discussing extensions to the DAIA ontology and format, we found that it
> would be helpful to identify an digital publication that is accessible
> via the Web. As far as I understand, a physical object and a digital
> publication are mutually exclusive manifestations in terms of RDA.

I like the way FaBiO does this part. fabio:Manifestation is subclassed by fabio:DigitalManifestation and fabio:AnalogManifestation. These are subclassed further by fabio:WebManifestation and fabio:PrintObject. Much of the rest of the FaBiO model is debatable, but IMO it makes sense to cherry pick across these vocabularies for the things they're good at.

> Given a publication <my:item>, how do I express that it is an
> electronic
> publication? My current solution is (in RDF/Turtle):
> <my:item>
>    a frbr:Manifestation ;
>    a <http://RDVocab.info/termLIst/extent/1031> .

<http://RDVocab.info/termLIst/extent/1031> is a skos:Concept not an rdfs:Class, so this wouldn't be the best way.

> or
> <my:item>
>    a frbr:Manifestation ;
>    dc:extent <http://RDVocab.info/termLIst/extent/1031> .

I'm going to guess that http://RDVocab.info/Elements/extent is the correct property to use, but there is no domain/range set on it, so it's hard to tell without digging deeper into the RDA documentation.

	a <http://RDVocab.info/uri/schema/FRBRentitiesRDA/Manifestation>;
	<http://RDVocab.info/Elements/extent> <http://RDVocab.info/termLIst/extent/1031>.

Even though dcterms and RDVocab both use the term "extent", I'm not sure they mean the same thing. The range on dcterms:extent is <http://purl.org/dc/terms/SizeOrDuration>, which is described this way:

URI: 	http://purl.org/dc/terms/SizeOrDuration
Label: 	Size or Duration
Definition: 	A dimension or extent, or a time taken to play or execute.
Comment: 	Examples include a number of pages, a specification of length, width, and breadth, or a period in hours, minutes, and seconds.

In contrast, here's the list of skos:Concepts in the http://RDVocab.info/termLIst/extent ConceptScheme:


As you noted, it is termLIst and case does matters.


> <http://RDVocab.info/termLIst/extent/1031> is from the RDA extent
> vocabulary, see
> http://metadataregistry.org/vocabulary/show/id/169.html.
> More specific lists of extent types can be found as "concepts" at:
> http://metadataregistry.org/vocabulary/show/id/62.html
> http://metadataregistry.org/vocabulary/show/id/63.html
> http://metadataregistry.org/vocabulary/show/id/64.html
> http://metadataregistry.org/vocabulary/show/id/96.html
> http://metadataregistry.org/vocabulary/show/id/59.html
> My questions:
> 1. What is the right relation between publication and its type?
> rdf:type ?
> dc:extent ?
> something else?
> 2. Can a publication have multiple types? Sure in RDF this is always
> possible but not every combination makes sense. Does RDA say something
> about this? For example I would think that a digitized microfiche of a
> piano score would be all of:
> http://RDVocab.info/termLIst/extent/1031 = Online Resource
> http://RDVocab.info/termLIst/extent/1031 = Microfiche
> http://RDVocab.info/termLIst/extentNoteMus/1007 = Piano Score
> Cheers,
> Jakob
> P.S: "termLIst" looks like a typo, isn't it?
> --
> Jakob Vo▀ <jakob.voss@gbv.de>, skype: nichtich
> Verbundzentrale des GBV (VZG) / Common Library Network
> Platz der Goettinger Sieben 1, 37073 G÷ttingen, Germany
> +49 (0)551 39-10242, http://www.gbv.de
Received on Thursday, 7 April 2011 15:07:07 UTC

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