- From: Neubert Joachim <J.Neubert@zbw.eu>
- Date: Thu, 22 Jan 2009 18:13:09 +0100
- To: "Houghton,Andrew" <houghtoa@oclc.org>, <public-esw-thes@w3.org>
- Message-ID: <3A59BB6451C972429019B12996F92DAD02392336@frodo.zbw-nett.zbw-kiel.de>
So, the example you built would look like this:
<skos:Concept rdf:about="http://zbw.eu/stw/descriptor/19289-4
<http://zbw.eu/stw/descriptor/19289-4> ">
<skos:prefLabel>Black market</skos:prefLabel>
<dct:relation>
<rdf:Description rdf:about="http://www.econis.eu/...=Black+market
<http://www.econis.eu/...=Black+market> ">
<dct:subject rdf:resource="http://zbw.eu/stw/descriptor/19289-4"
/>
</rdf:Description>
</dct:relation>
</skos:Concept>
Right, so far? The meaning, as I understand it, would be two statements
about two different subjects:
http://zbw.eu/stw/descriptor/19289-4
<http://zbw.eu/stw/descriptor/19289-4> has a dct:relation to
http://www.econis.eu/...=Black+market, and
http://www.econis.eu/...=Black+market has a dct:subject of
http://zbw.eu/stw/descriptor/19289-4
<http://zbw.eu/stw/descriptor/19289-4>
I'm not sure if I got this right -
Joachim
________________________________
Von: Houghton,Andrew [mailto:houghtoa@oclc.org]
Gesendet: Donnerstag, 22. Januar 2009 17:14
An: Neubert Joachim; public-esw-thes@w3.org
Betreff: RE: substitute for skos:isSubjectOf
Yup, I totally didn't understand what you meant. I thought
http://zbw.eu/stw/descriptor/19289-4 was the bibliographic resource not
the concept. However given that new information it's just a matter of
switching the URI's used in the example. The rdf:about on the
skos:Concept becomes http://zbw.eu/stw/descriptor/19289-4 and the
rdf:about on the rdf:Description becomes the URI for the bibliographic
resource and the rdf:resource on the dct:subject becomes
http://zbw.eu/stw/descriptor/19289-4. Sorry for the confusion.
Andy.
From: Neubert Joachim [mailto:J.Neubert@zbw.eu]
Sent: Thursday, January 22, 2009 11:04 AM
To: Houghton,Andrew; public-esw-thes@w3.org
Subject: 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
Received on Thursday, 22 January 2009 17:13:52 UTC