issue_comments: 280252632

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https://github.com/pydata/xarray/issues/1271#issuecomment-280252632 https://api.github.com/repos/pydata/xarray/issues/1271 280252632 MDEyOklzc3VlQ29tbWVudDI4MDI1MjYzMg== 6815844 2017-02-16T07:24:14Z 2017-02-16T07:24:14Z MEMBER

Thank you for the information. I agree that we should not strongly rely on attrs. Unit may change in arithmetic.

My sense is closest to the option 3 in #131. Some attrs should be tracked and other should be dropped. In the present stage, the most possible option is to add keep_attrs in xr.set_options? Or any destructive change will be an option? Such as to divide attrs into two kinds, units and metadata.

 
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