The complete DDS:
Dataset {
    Sequence {
        Int32 i;
        Int32 j;
        Sequence {
            Float32 f;
            Float32 g;
        } child;
    } parent;
} testb;
The data:
Sequence {
    Int32 i;
    Sequence {
        Float32 f;
    } child;
} parent = { { 32, { { -54.4 }, { -1.77 } } }, { 32768, { { -99.97 }, { -86 }, { -56.61 } } }, { 1048576, { { -90.17 } } } };