The complete DDS:

Dataset {

    Structure {

        Int32 j;

        Int32 k;

    } s1;

    Structure {

        Int32 l;

        Int32 m;

    } s2[10];

    Structure {

        Int32 n;

        Int32 o;

    } s3;

} test2;

The data:

Structure {

    Int32 j;

    Int32 k;

} s1 = { 123456789, 123456789 };