issue_comments: 906792475

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https://github.com/pydata/xarray/issues/5738#issuecomment-906792475 https://api.github.com/repos/pydata/xarray/issues/5738 906792475 IC_kwDOAMm_X842DI4b 1217238 2021-08-26T22:46:19Z 2021-08-26T22:46:19Z MEMBER

In the long term, I think we want to eliminate any requirements in Xarray's data model about what variables names are OK.

In particular: 1. We want to allow a coordinate named "foo" with different dimensions than ("foo",), in order to support reading all possible netCDF files into xarray. 2. We want to allow indexing with coordinates that are not dimensions.

With this second change in particular, it should not be a problem to have a multi-index level with the same name as a dimension.

It is true that this change will introduce an inconsistency between appropriate keys for use with sel (indexed coordinates) and isel (dimensions). But I think this is basically inevitable.

 
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