The complete DDS:
Dataset {
    Sequence {
        Int32 i;
        Int32 j;
        Sequence {
            Float32 f;
            Float32 g;
            Sequence {
                Byte a;
                Byte b;
            } baby;
        } child;
    } parent;
} testc;
The data:
Sequence {
    Int32 i;
    Sequence {
        Float32 f;
        Sequence {
            Byte a;
        } baby;
    } child;
} parent = { {  } };