issue_comments: 275498595

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https://github.com/pydata/xarray/issues/1199#issuecomment-275498595 https://api.github.com/repos/pydata/xarray/issues/1199 275498595 MDEyOklzc3VlQ29tbWVudDI3NTQ5ODU5NQ== 4160723 2017-01-26T20:07:25Z 2017-01-26T21:06:22Z MEMBER

We may not have gotten this right yet

I agree.

As any dimension can be indexed (at least lookup by position), the name "coordinate" may be indeed more appropriate, but we need also to make the distinction between coordinates which are IndexVariable objects and those which are Variable objects.

Any use case for dimensions which don't have an index (i.e., an IndexVariable) but have coordinates? This would be confusing too:

```

xr.Dataset({'foo': (('x', 'y'), [[1, 2], [3, 4]])}, ... {'c': (('x', 'y'), [[5, 6], [7, 8]])}) <xarray.Dataset> Dimensions: (x: 2, y: 2) Coordinates: c (x, y) int64 5 6 7 8 Data variables: foo (x, y) int64 1 2 3 4 Dimensions without coordinates: x, y ```

 
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