html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/1295#issuecomment-284468168,https://api.github.com/repos/pydata/xarray/issues/1295,284468168,MDEyOklzc3VlQ29tbWVudDI4NDQ2ODE2OA==,1217238,2017-03-06T17:25:59Z,2017-03-06T17:25:59Z,MEMBER,"I agree that ""auxiliary coordinate"" is a better name, but I think ""non-dimension coordinate"" is clearer for the rare cases where we want to refer to these coordinates, given that we don't have any name for these coordinates in the xarray data model itself.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,211888882
https://github.com/pydata/xarray/issues/1295#issuecomment-284273455,https://api.github.com/repos/pydata/xarray/issues/1295,284273455,MDEyOklzc3VlQ29tbWVudDI4NDI3MzQ1NQ==,1217238,2017-03-05T23:40:57Z,2017-03-05T23:40:57Z,MEMBER,"I think it's confusing to use ""coordinate"" to refer to only variables matching dimension names and that ""auxiliary coordinates"" are not a type of coordinate. It just doesn't make any sense in terms of the usual rules for categorizing things. This is especially problematic for software like xarray which people use without looking carefully at the docs, and for which many users aren't familiar with CF conventions.

So I feel pretty strongly that CF/NUG conventions get this one wrong, and for xarray we should say that anything in `.coords` is a coordinate variable, which we can further qualify in various ways.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,211888882
https://github.com/pydata/xarray/issues/1295#issuecomment-284198109,https://api.github.com/repos/pydata/xarray/issues/1295,284198109,MDEyOklzc3VlQ29tbWVudDI4NDE5ODEwOQ==,1217238,2017-03-05T01:32:51Z,2017-03-05T01:32:51Z,MEMBER,"> Should we simply call the former dimension coordinates and the latter optional coordinates?

Yes, let's call them ""dimension coordinates"".

The later could be called ""non-dimension coordinates"", but even dimension coordinates are optional so we shouldn't call these ""optional"".","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,211888882