The complete DDS:
Dataset {
    Sequence {
        Int32 i;
        Int32 j;
        Sequence {
            Float32 f;
            Float32 g;
        } child;
    } parent;
} testb;
The data:
Sequence {
    Int32 i;
    Int32 j;
    Sequence {
        Float32 f;
        Float32 g;
    } child;
} parent = { {  } };