http://example.org/boardgame-ontology#hasMentalLoad leaf node

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://example.org/boardgame-ontology#hasMentalLoad> a rdf:Property ;
    rdfs:domain <http://example.org/boardgame-ontology#Game> ;
    rdfs:range <http://example.org/boardgame-ontology#MentalLoad> ;
    sh:in ( <http://example.org/boardgame-ontology#easy> <http://example.org/boardgame-ontology#moderate> <http://example.org/boardgame-ontology#difficult> ) ;
    sh:maxCount 1 ;
    sh:minCount 0 .