cacontology-infrastructure:InfrastructureHostingCrossReferenceShape leaf node

@prefix cacontology-infrastructure: <https://cacontology.projectvic.org/infrastructure#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
cacontology-infrastructure:InfrastructureHostingCrossReferenceShape a sh:NodeShape ;
    rdfs:label "Infrastructure Hosting Cross Reference Shape"@en ;
    rdfs:comment "Validates that platform infrastructure has hosting relationships."@en ;
    sh:sparql [ sh:message "Platform infrastructure should have hosting provider relationships."@en ;
            sh:select """
            SELECT $this
            WHERE {
                $this a cacontology-infrastructure:PlatformInfrastructure .
                FILTER NOT EXISTS {
                    $this cacontology-infrastructure:hostedBy ?provider ;
                    ?provider a cacontology-infrastructure:HostingProvider .
                }
            }
        """ ] ;
    sh:targetClass cacontology-infrastructure:PlatformInfrastructure .