Thanks, Jonathan.
It would be very useful to hear from people who create or use datasets that
employ compression by gathering. The main question arising from the previous
discussion here is essentially:
* Should compression on related variables - such as auxiliary coordinates -
be
- required, or
- optional, or
- prohibited?
If _required_, then all that is required is some conventions text to support
what is already in the conformance document.
If _optional_ or _prohibited_ then the conformance document will also need to
be changed to allow for related variables to span dimensions that are not
spanned by the parent variable (à la DSG auxiliary coordinate variables)
when compression is in play.
If _required_ or _prohibited_ then it will not be possible to share related
variables between uncompressed and compressed data variables.
My slight preference is for _required_ because it puts compression by gathering
on the same footing as compression by DSG ragged array, i.e. controlled by the
parent data variable, and requires the least intervention to the conventions.
However, I have no problem with any of the other options if the consensus
moves their way.
Thanks, David
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