Re: multiple matching shapes and sh:closed

> On Jun 4, 2020, at 10:31 AM, Vladimir Alexiev <vladimir.alexiev@ontotext.com> wrote:
> 
> A node may be targeted by several shapes, right? Then all matching shapes are applied?

Correct
> 
> We plan to use some distribution of property shapes along a class hierarchy, eg:
> - ex:PersonShape checks for field ex:name
> - ex:PoliticianShape checks for extra fields ex:party and ex:politics.

Our normal practice is to declare classes to be node shapes - implicit targets and use the class hierarchy exactly as you describe.
> 
> The targeting could be done with RDFS inheritance (ex:PoliticianShape rdfs:subClassOf  ex:PersonShape) 
> or the more flexible "semantic type targeting" we discussed before.

As long as ex:PoliticianShape a rdfs:Class (or owl:Class) which is what the rdfs:subClassOf entails. The inheritance works through instances. In other words:

If class 1 has some property shapes and its subclass class 2 has some additional property shapes, then an instance of class 2 will be a target of shapes declared at class 1 and class 2 - because it is also an instance of class 1.
> 
> What to do if I want to say that a politician can have only those 3 props (plus rdf:type) and no other?

Hmm…

If your instances are members of these shape/classes, then I think it would be a problem because they would not conform to the shapes at parent classes.

If they are members of some other classes and your targets are explicit, then I do not think it is a problem. But I am not sure what you will be accomplishing by using subclasses.

You may also want to check out sh:node.

> I can't apply sh:closed to either of the shapes because it would close each one individually but I need them closed collectively.
> 
> Guess I could use sh:and to put the two shapes together, but that would double the work of checking ex:name 
> (because a politician also matches ex:PersonShape)
> 
> -- 
> Vladimir Alexiev, PhD, PMP
> Chief Data Architect
> Sirma AI, trading as Ontotext: https://www.ontotext.com <https://www.ontotext.com/>, LinkedIn <https://www.linkedin.com/company-beta/208070>, Twitter <https://twitter.com/ontotext>, Rate GraphDB <http://www.capterra.com/database-management-software/reviews/157533/Graph%20DB/Ontotext/new>Email: vladimir.alexiev@ontotext.com <mailto:vladimir.alexiev@ontotext.com>, skype:valexiev1
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