Wes McKinney commented on ARROW-6823:

I see. It's probably time for me to take care of the FeatherV2 implementation. 
It's probably a take of work or less -- I think it is probably doable for 1.0.0

> [C++][Python][R] Support metadata in the feather format?
> --------------------------------------------------------
>                 Key: ARROW-6823
>                 URL: https://issues.apache.org/jira/browse/ARROW-6823
>             Project: Apache Arrow
>          Issue Type: Improvement
>            Reporter: Joris Van den Bossche
>            Priority: Major
>              Labels: feather
> This might need to wait / could be enabled by the feather v2 (ARROW-5510), 
> but thought to open a specific issue about it: do we want to support saving 
> metadata in feather files?
> With Parquet files, you can have file-level metadata (which we currently use 
> to eg store the pandas_metadata). I think it would be useful to have a 
> similar mechanism for Feather files.
> A use case where this came up is in GeoPandas where we would like to store 
> the Coordinate Reference System identifier of the geometry data inside the 
> file, to avoid needing a sidecar file just for that.
> In a v2 world (using the IPC format), I suppose this could be the metadata of 
> the Schema.

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