cacontology-custodial:CustodialCrossReferenceShape leaf node

@prefix cacontology-custodial: <https://cacontology.projectvic.org/custodial#> .
@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#> .
cacontology-custodial:CustodialCrossReferenceShape a sh:NodeShape ;
    rdfs:label "Custodial Cross Reference Shape"@en ;
    rdfs:comment "Validates cross-references between custodial relationships and related entities."@en ;
    sh:sparql [ sh:message "Custodial relationship must involve both a custodian and a child."@en ;
            sh:prefixes [ sh:declare [ sh:namespace "https://cacontology.projectvic.org/custodial#"^^xsd:anyURI ;
                            sh:prefix "cacontology-custodial" ] ] ;
            sh:select """
            SELECT ?this
            WHERE {
                ?this a cacontology-custodial:CustodialRelationship .
                FILTER NOT EXISTS {
                    ?this cacontology-custodial:involvesCustodian ?custodian ;
                          cacontology-custodial:involvesChild ?child .
                }
            }
        """ ] ;
    sh:targetClass cacontology-custodial:CustodialRelationship .