My subjective answer:

RDFS has OWA semantics, but RDFS has so little expressivity that it’s OW-ness 
doesn’t really become a problem. So I would consider the inclusion of RDFS 
definitions “mostly harmless”. Especially rdfs:subClassOf is fine. I find 
rdfs:domain and rdfs:range more problematic, but that’s not because of OWA per 
se, but because their semantics is not what most people expect.

Richard


> On 4 Jul 2018, at 08:01, Bohms, H.M. (Michel) <[email protected]> wrote:
> 
> In case the purpose of modelling is really ‘data validation’ would it be 
> better to go for SHACL-only (ie CWA-only) or still combine SHACL with RDFS?
> (like in http://spinrdf.org/shacl-and-owl.html 
> <http://spinrdf.org/shacl-and-owl.html>). Would there be a downside of a 
> SHACL-only approach. Like always having to specify properties in the context 
> of a shape?
>  
> In case of validation AND data sharing would it still work or would it be 
> better to use ‘RDFS + SHACL’ where the SHACL is separately used at say 2 
> validation sides (importing the RDFS) and RDFS-only for the sharing spec?
> But then introducing some potential OWA/inference in the middle (that doesn’t 
> HAVE to be utilized). Or is all THAT inference harmless wrt OWA/CWA 
> discussion (ie inferencing rdfs superclass instantiation).
>  
> Thx for your views here, Michel
>  
>  
>  
>  
> Dr. ir. H.M. (Michel) Böhms
> Senior Data Scientist
> 
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