issue_comments: 705066436

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https://github.com/pydata/xarray/pull/4484#issuecomment-705066436 https://api.github.com/repos/pydata/xarray/issues/4484 705066436 MDEyOklzc3VlQ29tbWVudDcwNTA2NjQzNg== 1277781 2020-10-07T16:56:04Z 2020-10-07T16:56:04Z CONTRIBUTOR 
* Are there many other cases outside of `xr.dot` which only operate on `DataArray`s? If not, we could update that function to take a `Dataset`

I think it would be a good idea to extend dot to Datasets. However a user may wish to map a custom DataArray function to Dataset.

* Maybe jumping ahead — are there functions where the result of `func(ds1, ds2)` shouldn't be that function mapped over the matching variables?

Not sure of the context of this. In the most general case one can certainly implement any function on ds1 and ds2. Or are you referring to the built-ins such as .dot?

 
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