Ref. metadata at higher level now use '~' in keys
For reference metadata at higher-levels, in addition (to keep backward-compatibility) to empty indexes, the keys in data\dataSets\observations
and data\dataSets\dimensionGroupAttributes
can now contain a tilde ~
character for dimensions without values, e.g.,:
"~:0:0:~": [2]`
Example
Edited by Jens Dossé