cacontology-coord:CoordinationCrossReferenceShape leaf node

@prefix cacontology-coord: <https://cacontology.projectvic.org/investigation-coordination#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
cacontology-coord:CoordinationCrossReferenceShape a sh:NodeShape ;
    rdfs:label "Coordination Cross Reference Shape"@en ;
    rdfs:comment "Validates cross-references between coordination and related entities."@en ;
    sh:sparql [ sh:message "Investigation coordination must involve at least two agencies and use communication protocols."@en ;
            sh:select """
            SELECT $this
            WHERE {
                $this a cacontology-coord:InvestigationCoordination .
                FILTER NOT EXISTS {
                    $this cacontology-coord:involvesAgency ?agency1, ?agency2 ;
                          cacontology-coord:usesProtocol ?protocol .
                    FILTER (?agency1 != ?agency2)
                }
            }
        """ ] ;
    sh:targetClass cacontology-coord:InvestigationCoordination .