issue_comments: 1076777717

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https://github.com/pydata/xarray/issues/6374#issuecomment-1076777717 https://api.github.com/repos/pydata/xarray/issues/6374 1076777717 IC_kwDOAMm_X85ALlL1 905179 2022-03-23T20:15:18Z 2022-03-23T20:15:18Z NONE

As the moment, NCzarr format files (as opposed to pure Zarr format files produced by NCZarr) do not include the Xarray _ARRAY_DIMENSIONS attribute. Now that I think about it, there is no reason not to include that attribute where it is meaningful, so I will make that change. After that change, the situation should be as follows:

Xarray can read any nczarr format file subject to the following conditions:
1. xarray attempts to read only the root group and ignores subgroups
    * this is because xarray cannot handle subgroups.
2. the xarray implementation ignores extra dictionary keys in e.g. .zarray and .zattr
   that it does not recognize
    * this should already be the case under the principle of "read broadly, write narrowly".

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