AW: substitute for skos:isSubjectOf

Hi Andrew,
 
dcterms:subject is defined as "The topic of the resource", and I don't
want to say: The result list of the search
http://www.econis.eu/...=Black+market is the subject of the skos:Concept
w/ prefLabel "Black+market".
 
Regards, Joachim


________________________________

	Von: Houghton,Andrew [mailto:houghtoa@oclc.org] 
	Gesendet: Donnerstag, 22. Januar 2009 16:22
	An: public-esw-thes@w3.org
	Betreff: RE: substitute for skos:isSubjectOf
	
	

	Why couldn't you do something like:

	 

	<?xml version="1.0"?>

	<rdf:RDF

	  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

	  xmlns:dct="http://purl.org/dc/terms/"

	  xmlns:skos="http://www.w3.org/2008/05/skos#"

	> 

	  <skos:Concept rdf:about="http://www.w3.org/">

	    <skos:prefLabel>Black market</skos:prefLabel>

	    <dct:relation>

	      <rdf:Description
rdf:about="http://zbw.eu/stw/descriptor/19289-4">

	        <dct:subject
rdf:resource="http://www.econis/...=Black+market" />

	      </rdf:Description>

	    </dct:relation>

	  </skos:Concept>

	</rdf:RDF>

	  

	 

	 

	From: public-esw-thes-request@w3.org
[mailto:public-esw-thes-request@w3.org] On Behalf Of Neubert Joachim
	Sent: Thursday, January 22, 2009 9:57 AM
	To: public-esw-thes@w3.org
	Subject: substitute for skos:isSubjectOf

	 

	The SKOS Primer recommends using dc:subject for indexing
purposes. For the inverse relation - this concept "is subject of" or
"indexes" that resource - it gives no recommendation. The discussion
about indexing properties in SKOS (commendably summarized in
http://www.w3.org/2006/07/SWD/wiki/SkosDesign/Indexing) also paid no
attention to the now vanished skos:isSubjectOf. 

	 

	But it's definitively missing. My use case is this:

	 

	On the upcoming RDFa-enriched web pages for the Standard
Thesaurus Economics (maintained by the German National Library of
Economics, ZBW), we will include links to library resources. This links
trigger a search for the concept at hand in the subject index of the
library database - e.g. 

	
http://www.econis.eu/DB=1/LNG=EN/CMD?ACT=SRCHM&IKT3=46&TRM3=Black+market
searches for the concept http://zbw.eu/stw/descriptor/19289-4 with the
prefLabel "Black market" and returns a result page with further links to
books, articles and so on (not RDFa-enriched up to now, but this could
change). To enhance the Web of Linked Data, I want to express this
relationship in RDFa also. A triple

	 

	http://zbw.eu/stw/descriptor/19289-4
<http://zbw.eu/stw/descriptor/19289-4>  skos:isSubjectOf
http://www.econis.eu/...=Black+market 

	 

	would have been perfect. (Of cause, the inverse relation can be
expressed easily by dc:subject, but that puts the descriptor in the
object position.)

	 

	I understand that the missing relation may be, strictly spoken,
not part of the KOS (but an application of the KOS to resources) and
therefore may be outside the scope of SKOS. But nevertheless a
substitute is required. 

	 

	It would be easy to define some custom property, e.g.
zbw:indexes, with skos:Concept as domain and rdf:resource as range. But
since I feel that this may be a requirement not only by our site, there
should be a more common, standardized way.

	 

	I did some research on this, but was out of luck:

	 

	- dc:subject lacks an inverseProperty

	- sioc:topic dito

	- dcterms:references/dcterms:isReferencedBy seems to be aimed at
citations and alike

	- ore:describes/ore:isDescribedBy is too restricted in
Domain/Range (ore:ResourceMap/ore:Aggregation)

	- rdfs:seeAlso is too general

	- frbr:isSubjectOf could be fine if domain and range are
sufficiently general, but I couldn't figure out the status of this one
(it is described as a skos:Concept in
http://sandbox.metadataregistry.org/concept/show/id/923.html, but is not
part of http://purl.org/vocab/frbr/core or
http://purl.org/vocab/frbr/extended)

	 

	I'm convinced that terminologies - expressed in SKOS - could
perfectly serve as hubs in a Web of Linked Data. To this end, it would
be highly beneficial to figure out and recommend a uniform way to link
from skos:Concepts to arbitrary other resources. Can we do this?

	 

	Kind regards, Joachim