Dataset {
    Byte b1;
    Byte /g1/i8;
    Structure {
        Int16 i16;
        UInt16 ui16;
        Url u;
    } /g1/s;
    String /g2/s;
    Float64 /g2/gg2/f64;
    Structure {
        Int32 i16;
        UInt32 ui16;
        Url u;
    } /g2/gg2/s;
} EnumDMR_4.0;
