Publication types in RDF with RDA

Hi,

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.

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> .

or

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


<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 Voß <jakob.voss@gbv.de>, skype: nichtich
Verbundzentrale des GBV (VZG) / Common Library Network
Platz der Goettinger Sieben 1, 37073 Göttingen, Germany
+49 (0)551 39-10242, http://www.gbv.de

Received on Thursday, 7 April 2011 13:08:25 UTC