cacontology-ai:ModelTrainingShape leaf node

@prefix cacontology-ai: <https://cacontology.projectvic.org/ai-csam#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
cacontology-ai:ModelTrainingShape a sh:NodeShape ;
    rdfs:label "Model Training Shape"@en ;
    rdfs:comment "Enhanced validation shape for model training instances with gUFO Event validation and training phases."@en ;
    sh:rule [ a sh:SPARQLRule ;
            sh:construct """
            INSERT { $this a cacontology-ai:PhaseValidationError . }
            WHERE {
                $this a cacontology-ai:ModelTraining .
                FILTER NOT EXISTS { 
                    $this cacontology-ai:hasPhase ?phase ;
                    ?phase a cacontology-ai:ContentGenerationPhase .
                }
            }
        """ ;
            sh:message "Model training should involve generation phases"@en ;
            sh:prefixes cacontology-ai: ;
            sh:severity sh:Violation ] ;
    sh:targetClass cacontology-ai:ModelTraining .