Global das_doubles2csv (char *pBuf, size_t uBufSz, const double *pValues, int nValues): this function is a potential source of buffer overruns, fix it.
Global das_units: Redo units as small structures
Global DasAry::new_DasAry (const char *id, das_val_type et, size_t sz_each, const ubyte *fill, int rank, size_t *shape, das_units units): see if these restrictions can be lifted.
Struct DasDesc: Move child relationship into the descriptor base class, parent is there but the other direction is missing
Global DasDesc::DasDesc_equals (const DasDesc *pThis, const DasDesc *pOther): maybe check parents too.
Struct DasDs: explain variables in dimensions and point-spreads
Global DasStream::DasStream_getDesc (const DasStream *pThis, int id): : Increase packet ID spice to ushort (1 to 2^16)