Re: Is union of targets distinct?

Here is my implementation of Shape.getTargetNodes()

     public Set<RDFNode> getTargetNodes(Dataset dataset) {
         Set<RDFNode> results = new HashSet<>();
         for(Target target : targets) {
             target.addTargetNodes(dataset, results);
         }
         return results;
     }

So, it's using a Set which means each target node will only be validated 
once even if in multiple targets at the same shape.

I believe this is following the intention of the spec. Does any 
implementer here disagree?

Holger



On 2022-01-07 4:58 am, Vladimir Alexiev wrote:
> https://www.w3.org/TR/shacl/#targets: "union of terms produced by the 
> individual targets that are declared by the shape".
>
> Say I have a shape with the following targeting:
>
> sh:targetClass :Foo;
> sh:targetSubjectsOf :bar, :baz;
> sh:targetObjectsOf :blor;
>
> Say a node matches all of these conditions:
> will it be selected for validation once and not 4 times?
>
> I.e., is the "union of terms" supposed to be DISTINCT?
> (Union in mathematics is distinct, but not in SPARQL)
>
> -- 
> Vladimir Alexiev, PhD, PMP
> Chief Data Architect
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