issue_comments: 243350429

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https://github.com/pydata/xarray/issues/992#issuecomment-243350429 https://api.github.com/repos/pydata/xarray/issues/992 243350429 MDEyOklzc3VlQ29tbWVudDI0MzM1MDQyOQ== 3404817 2016-08-30T06:59:14Z 2016-08-30T06:59:14Z CONTRIBUTOR

I think it makes sense to preserve the UNLIMITED state through read/write. In my case, I subset a netCDF file along lat and lon dimensions, leaving the time dimension untouched and would therefore expect it to pass unchanged through xarray IO (staying UNLIMITED).

However, when the dataset is indexed/subset/resampled along the unlimited dimension, it would make sense that its state is dropped. But that would require a lot of ifs and buts, so I suggest we leave that aside for now.

 
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