On 16/09/2020 06:13, cbur...@healthwise.org wrote:
2. *A different property pair constraint:* This
case is nearly the opposite of the above. Suppose
I wish to specify that any value of ex:property4
(which has sh:maxCount 1) *must be* one of the
values of ex:property5 (which has no sh:maxCount).
How would I express that? (I don't see a way to do
it using sh:equals.)
SPARQL-based constraint
Yes or dash:subSetOf already implements this SPARQL
constraint:
http://datashapes.org/constraints.html#SubSetOfConstraintComponent
<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdatashapes.org%2Fconstraints.html%23SubSetOfConstraintComponent&data=02%7C01%7Ccburnett%40healthwise.org%7C29db85d271374b14b53808d859a6129d%7Ccee5d4e942e548c28a033406fd5b9242%7C0%7C0%7C637357917099406940&sdata=cj1sbmpSxLsMip%2Fog3p5%2Fh8zEoT3TSNCczd58mT9FI8%3D&reserved=0>
Holger
Holger, when using dash:subSetOf, is there a way to put an *or *in
there? Like, a property's value must be a subset of property_1 OR
property_2?
One option is to surround it with an outer sh:or, e.g.
ex:TestShape
a sh:NodeShape ;
sh:or (
[
sh:property [
sh:path ex:property1 ;
dash:subSetOf ex:other ;
]
]
[
sh:property [
sh:path ex:property2 ;
dash:subSetOf ex:other ;
]
]
) .
Depending on your desired semantics, you may also use a | path expression:
ex:TestShape
a sh:NodeShape ;
sh:property [
sh:path [
sh:alternativePath ( ex:property1 ex:property2 )
] ;
dash:subSetOf ex:other ;
] .
The meaning of the latter is that the combined values of prop1 and prop2
must be a subset, so this may not be the exact semantics that you need.
Holger
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