Hi Michel

I would say you’ve not given enough background for a clear answer.

Background items like these could change the answer :

Are you sharing with others?  If so, what tools do they have?

Are you implementing an app? If not what or who is the customer?

Are you defining  something to be taken and extended by others?

Where is source of any data?  Does it have a data model? Is it a fixed or 
growing set of data, or does it not exist yet?
For example, if your data is fully specified wrt data type and type and is 
complete and a good existing app generates it and you are just harvesting it 
for linking, for example, then  OWA concerns are less important.

Just a few thoughts to consider.

Cheers,
David

> On 4 Jul 2018, at 11:54, Bohms, H.M. (Michel) <[email protected]> wrote:
> 
> Thx!
>  
> So, to be sure (100-harmless), I could use even a subset of RDFS (“RDFS-“) 
> without domain & range for sharing the vocabulary.
> Domain and range can come in at SHACL.
>  
> ‘RDFS-‘ would then be simply:
> - rdfs:Class
> - rdfs:Property
> - rdfs:Datatype
> - rdfs:subClassOf
> - rdfs:subPropertyOf
> - meta-stuff like: rdfs:label / rdfs:comment /rdfs:seeAlso / rdfs:isDefinedBy
>  
>  
>  
>  
> Dr. ir. H.M. (Michel) Böhms
> Senior Data Scientist
> 
> T +31888663107
> M +31630381220
> E [email protected]
> Location
> 
>  
> <image001.gif>
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> From: [email protected] <[email protected]> On 
> Behalf Of Richard Cyganiak
> Sent: woensdag 4 juli 2018 12:14
> To: [email protected]
> Subject: Re: [topbraid-users] SHACL usage
>  
> 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). 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
> 
> 
> T +31888663107
> M +31630381220
> E [email protected]
> Location
> 
>  
> <image001.gif>
> This message may contain information that is not intended for you. If you are 
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> requested to inform the sender and delete the message. TNO accepts no 
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