AW: substitute for skos:isSubjectOf

Hi Andy, 
 
I'm not sure if I understood exactly what you mean. In my example,
http://zbw.eu/stw/descriptor/19289-4 is the URI of the skos:Concept. I
do not see how I could express an inverse relation to dc:subject by
means of dcterms:relation. As rdfs:seeAlso, dcterms:relation in itself
appears to me too general to serve as an substitute for
skos:isSubjectOf.
 
Regards, Joachim


________________________________

	Von: Houghton,Andrew [mailto:houghtoa@oclc.org] 
	Gesendet: Donnerstag, 22. Januar 2009 16:38
	An: Neubert Joachim; public-esw-thes@w3.org
	Betreff: RE: substitute for skos:isSubjectOf
	
	

	Right, I see a few mistakes in what I did, but assuming the URI
for skos:Concept is http://www.econis.eu/concept/Black+market, then
change the dct:subject to http://www.econis.eu/concept/Black+market.
Now I think it says that the resource at
http://zbw.eu/stw/descriptor/19289-4 has the subject Black market.  Does
that help?

	 

	Andy.

	 

	From: Neubert Joachim [mailto:J.Neubert@zbw.eu] 
	Sent: Thursday, January 22, 2009 10:34 AM
	To: Houghton,Andrew; public-esw-thes@w3.org
	Subject: 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