Hi,
I am trying to recreate a recursive magic property, using a SHACL property
shape. However, I suspect that the reason the recursion is not working is
because the property identified in the sh:path statement isn't really a
function in the same sense as a magic property is a function.
My shape code is as follows:
qudt:QuantityKind-appropriateUnit
rdf:type sh:NodeShape ;
sh:property [
rdf:type sh:PropertyShape ;
sh:path qudt:dappropriateUnit ;
sh:values [
sh:prefixes <http://qudt.org/2.1/schema/shacl/overlay/qudt> ;
sh:select """SELECT DISTINCT ?unit
WHERE {
{
?unit qudt:hasQuantityKind $this .
}
UNION
{
NOT EXISTS {
?unit qudt:hasQuantityKind $this .
} .
$this skos:broader ?parent1 .
?parent1 qudt:dappropriateUnit ?unit .
} .
} """ ;
] ;
] ;
sh:targetClass qudt:QuantityKind ;
.
The non-recursive part works (the first clause of the union). But the
second union clause does not work. Is there a way to make the
qudt:dappropriateUnit property know that there's this associated sh:values
clause?
Steve
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