Periodic Table Database Schema - v0.7.1
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    HazardGroup: Group<
        {
            classes?: Group<
                {
                    adr?: Many<PrimitiveProperty<ADRClass>>;
                    dot?: Many<PrimitiveProperty<DOTClass>>;
                    ghs?: Many<PrimitiveProperty<GHSClass>>;
                    whmis?: Many<PrimitiveProperty<WHMISClass>>;
                },
            >;
            labels?: Many<StructProperty<SafetyLabel>>;
            nfpa?: One<StructProperty<NFPA>>;
            pictograms?: Many<PrimitiveProperty<GHSPictogram>>;
            remarks?: LangGroup<Many<PrimitiveProperty<string>>, never>;
            signalWord?: One<PrimitiveProperty<SignalWord>>;
            statements?: One<StructProperty<HazardStatements>>;
        },
    >

    Collection of regulatory identifiers and qualitative safety data.