Global das_doubles2csv (char *buf, const double *value, int nitems)

this function is a potential source of buffer overruns, fix it.

Redo units as small structures

Move child relationship into the descriptor base class, parent is there but the other direction is missing

This implementation is very inefficient requring many small malloc's and order(N) object lookups. It also has types, keys and values all mixed together in the same array or the same value. This makes object lookup a wierd i+=2 iteration with ":" searches. We only get away with this because not much is stored in the properies arrays.

Global DasDesc::DasDesc_equals (const DasDesc *pOne, const DasDesc *pTwo)

maybe check parents too.

Class DasDs

explain variables in dimensions and point-spreads