issue_comments: 237250366

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https://github.com/pydata/xarray/issues/921#issuecomment-237250366 https://api.github.com/repos/pydata/xarray/issues/921 237250366 MDEyOklzc3VlQ29tbWVudDIzNzI1MDM2Ng== 2443309 2016-08-03T14:20:02Z 2016-08-03T14:20:02Z MEMBER

It seems to me that xarray has the same convention for dims that netCDF4 has for dimensions, OrderedDict for the dataset, tuple for the variables (DataArrays).

I do see the utility in switching to an OrderedDict for both. I have had times where I need to know the size of a dimension on a data array and as @shoyer mentioned, its a bit of a hunt at the moment. That would be my vote if we're willing to make that breaking change. 

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