What is VLib.validateShape actually returns the focusNode + Path +
valueNodes that conform to each shape ? or emit them through a listener ?
(
https://github.com/apache/jena/blob/5ce8c141d425655bcaa9d7567117659e502a7ff1/jena-shacl/src/main/java/org/apache/jena/shacl/validation/VLib.java#L89
)
The idea would be to use the Validator as a "filter" that emits the triples
valid according to shapes, so that they can be aggregated in an output
graph.
Le mer. 9 mars 2022 à 13:45, Florian Kleedorfer <
florian.kleedor...@austria.fm> a écrit :
> Am 2022-03-09 13:22, schrieb Thomas Francart:
>
> >> I think you could do it with jena. Load the dara into a Graph, then
> >> get
> >> the focus nodes for all shapes you want using VLib.focusNodes.
> >> evaluate
> >> each shape on its focus nodes and compile the intersection of all
> >> focus
> >> nodes that are valid, along with the shapes. Now evaluate the shapes
> >> again
> >> on these valid focus nodes and record all the triples/quads that are
> >> pulled
> >> from the data graph during evaluation.
> >>
> >
> > But does this guarantee that all triples pulled from the data graph are
> > valid triples ?
> > For example I may have
> >
> > ex:myConcept skos:prefLabel "english label"@en, "german label"@de .
> >
> > And my SHACL would specify a Shape that mandates English :
> >
> > ex:MyShape a sh:NodeShape ;
> > sh:property [
> > sh:property skos:prefLabel ;
> > sh:languageIn ("en") ;
> > ]
> >
> > In that case, does only the skos:prefLabel with an english lang be
> > pulled
> > from the graph ?
> >
> > I take the hypothesis that any triple pulled from the graph are the one
> > for
> > which the predicate is indicated in sh:property, but this does not
> > guarantee that the triple is valid.
> > Wouldn't this require to know whether each individual triples has
> > matched
> > all the constraints of the shape to output it or not ?
>
> I think you are right. You'd get a bigger set than the triples you
> actually want. You can probably use the validation result to filter out
> the triples that cause violations - although I am not positive it will
> work in every instance. I'd try, though.
>
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