export declare const groups: {
    "predefined": {
        "predefined": boolean;
    };
    "iso8879": {
        "8879-isoamsa": boolean;
        "8879-isoamsb": boolean;
        "8879-isoamsc": boolean;
        "8879-isoamsn": boolean;
        "8879-isoamso": boolean;
        "8879-isoamsr": boolean;
        "8879-isobox": boolean;
        "8879-isocyr1": boolean;
        "8879-isocyr2": boolean;
        "8879-isodia": boolean;
        "8879-isogrk1": boolean;
        "8879-isogrk2": boolean;
        "8879-isogrk3": boolean;
        "8879-isogrk4": boolean;
        "8879-isolat1": boolean;
        "8879-isolat2": boolean;
        "8879-isonum": boolean;
        "8879-isopub": boolean;
        "8879-isotech": boolean;
    };
    "iso9573-13": {
        "9573-13-isoamsa": boolean;
        "9573-13-isoamsb": boolean;
        "9573-13-isoamsc": boolean;
        "9573-13-isoamsn": boolean;
        "9573-13-isoamso": boolean;
        "9573-13-isoamsr": boolean;
        "9573-13-isogrk3": boolean;
        "9573-13-isogrk4": boolean;
        "9573-13-isomfrk": boolean;
        "9573-13-isomopf": boolean;
        "9573-13-isomscr": boolean;
        "9573-13-isotech": boolean;
    };
    "mathml": {
        "8879-isobox": boolean;
        "8879-isocyr1": boolean;
        "8879-isocyr2": boolean;
        "8879-isodia": boolean;
        "8879-isolat1": boolean;
        "8879-isolat2": boolean;
        "8879-isonum": boolean;
        "8879-isopub": boolean;
        "9573-13-isoamsa": boolean;
        "9573-13-isoamsb": boolean;
        "9573-13-isoamsc": boolean;
        "9573-13-isoamsn": boolean;
        "9573-13-isoamso": boolean;
        "9573-13-isoamsr": boolean;
        "9573-13-isogrk3": boolean;
        "9573-13-isomfrk": boolean;
        "9573-13-isomopf": boolean;
        "9573-13-isomscr": boolean;
        "9573-13-isotech": boolean;
        "mmlextra": boolean;
        "mmlalias": boolean;
    };
    "html4": {
        "html4-lat1": boolean;
        "html4-special": boolean;
        "html4-symbol": boolean;
    };
};
export declare type Group = keyof typeof groups;