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    Variable MetaValueSchemaConst

    MetaValueSchema: TObject<
        {
            description: TOptional<TString>;
            displayName: TOptional<TString>;
            displayScale: TOptional<TObject<{ lower: TNumber; upper: TNumber }>>;
            displayUnits: TOptional<
                TUnion<
                    [
                        TObject<
                            {
                                category: TString;
                                displayFormat: TOptional<TString>;
                                targetUnit: TOptional<TString>;
                            },
                        >,
                        TObject<
                            {
                                category: TString;
                                displayFormat: TOptional<TString>;
                                formula: TString;
                                inverseFormula: TString;
                                symbol: TString;
                                targetUnit: TString;
                            },
                        >,
                    ],
                >,
            >;
            example: TOptional<TString>;
            supportsPut: TOptional<TBoolean>;
            timeout: TOptional<TUnion<[TNumber, TLiteral<"auto">]>>;
            units: TOptional<TString>;
            updateContract: TOptional<
                TUnion<[TLiteral<"periodic">, TLiteral<"event">]>,
            >;
            zones: TOptional<
                TArray<
                    TObject<
                        {
                            lower: TOptional<TNumber>;
                            message: TString;
                            state: TUnion<
                                [
                                    TLiteral<"nominal">,
                                    TLiteral<"normal">,
                                    TLiteral<"alert">,
                                    TLiteral<"warn">,
                                    TLiteral<"alarm">,
                                    TLiteral<"emergency">,
                                ],
                            >;
                            upper: TOptional<TNumber>;
                        },
                    >,
                >,
            >;
        },
    > = ...

    Metadata payload for a Signal K path. Contains display hints, units, timeout, and alarm zones.