The SHACL-AF spec <https://w3c.github.io/shacl/shacl-af/#minus> contains a
definition for a property called sh:minus, but I don't think my brain is
able to parse it properly. Some examples might help, but the only one I've
been able to find anywhere is in Example 3 of this tutorial
<https://www.topquadrant.com/graphql/values.html#examples-family>, where
sh:this is used as the object of sh:minus.
What I want to do is define a property shape that infers a list of values
that is calculated by taking all the values of another property shape --
call it ex:includes -- and removing all the values of a third property
shape -- call it ex:excludes. But I can't seem to write a valid sh:values
statement that does this.
Is sh:minus even the right property to use for this? If so, what is the
proper syntax? For what it's worth, this was one of my attempts:
sh:values [
sh:nodes [
sh:path ex:includes;
] ;
sh:minus ex:excludes;
] ;
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