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RE: skos:hasTopConcept mandatory?

From: Johan De Smedt <johan.de-smedt@tenforce.com>
Date: Wed, 4 Sep 2013 06:57:16 +0200
To: "'Thomas Francart'" <thomas.francart@sparna.fr>, <oreste.signore@isti.cnr.it>
Cc: "'SKOS'" <public-esw-thes@w3.org>
Message-ID: <00c301cea92b$3ac770c0$b0565240$@tenforce.com>
Hi Thomas,


I agree with all your remarks.

Though concerning the remark below (a top concept having a broader concept) though, I would like to nuance.

- SKOS though leaves this open as it allows to represent directed graphs where top concepts are just entry points.

  (I do not know if there are useful applications for this.)

  See: http://www.w3.org/TR/skos-reference/#L2446 <http://www.w3.org/TR/skos-reference/%23L2446> 

- For common hierarchical schemes and thesauri (standard ISO 25964) indeed indicate that a top concept cannot be a narrower concept of any other concept.


(Validation rules may differ per application. Uniqueness preferred labels per language is another such characteristic.)


Kind Regards,


Johan De Smedt 

Chief Technology Officer


mail:  <mailto:johan.de-smedt@tenforce.com> johan.de-smedt@tenforce.com

mobile: +32 477 475934



From: Thomas Francart [mailto:thomas.francart@sparna.fr] 
Sent: Tuesday, 03 September, 2013 19:51
To: oreste.signore@isti.cnr.it
Subject: Re: skos:hasTopConcept mandatory?



[JDS:>] […cut…]


Is it acceptable that a TopConcept is narrower than another Concept/TopConcept? 


Certainly not. If a top-level concept is moved down the hierarchy, its topConceptOf/hasTopConcept properties should be deleted.




[1] SKOS Play : http://labs.sparna.fr/skos-play/



Thomas Francart - Sparna
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Received on Wednesday, 4 September 2013 04:57:46 UTC

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