erDiagram
    Capability }o--o{ Layer : BELONGS_TO_LAYER
    GovernancePlane }o--o{ Layer : GOVERNS_LAYER
    ComponentVersion }o--o{ GovernancePlane : INFORMS
    Provider }o--o{ Service : OFFERS
    PublicPolicy }o--o{ PolicyVersion : HAS_VERSION
    ChangeSignal }o--o| PolicyVersion : FROM_VERSION
    ChangeSignal }o--|| PolicyVersion : TO_VERSION
    ChangeSignal }o--o{ Service : AFFECTS_SERVICE
    GovernanceCase }o--o{ AISystemVersion : GOVERNS_VERSION
    ApplicabilityAssessment }o--|| ChangeSignal : ASSESSES_SIGNAL
    ApplicabilityAssessment }o--|| AISystemVersion : ASSESSES_SYSTEM
    ApplicabilityAssessment }o--o{ RequirementVersion : CONSIDERS_REQUIREMENT
    ApplicabilityAssessment }o--o| Actor : REVIEWED_BY
    ControlImplementation }o--|| ControlDefinition : IMPLEMENTS
    ControlDefinition }o--o{ RequirementVersion : ADDRESSES_REQUIREMENT
    ControlImplementation }o--|{ AISystemVersion : APPLIES_TO_SYSTEM
    EvidenceClaim }o--|| EvidenceArtifact : USES_ARTIFACT
    EvidenceEvaluation }o--|| EvidenceClaim : EVALUATES_CLAIM
    GateInstance }o--|{ AISystemVersion : REVIEWS_SYSTEM
    GateDecisionRecord }o--|| GateInstance : DECISION_FOR_GATE
    GateDecisionRecord }o--|| Actor : DECIDED_BY
    GateDecisionRecord }o--o{ ApplicabilityAssessment : BASED_ON_ASSESSMENT
    GateDecisionRecord }o--o| GateDecisionRecord : SUPERSEDES