rok commented on PR #635:
URL: https://github.com/apache/parquet-format/pull/635#issuecomment-6656578659

   > I don't know... My hope was that inline would serve as a cache for small 
data for sequential read use cases. I was still hoping that we could still send 
the file reference to a remote server for example where it can read files 
directly instead of having to send the bytes over the wire. This change would 
force us to send the bytes over the wire. That's why we kept the definition 
somewhat open.
   
   Sending `uri`s over network instead ob `inline` bytes makes sense. As 
mutability of remote files is out of our scope we can't really prescribe 
anything about writing. But we do have etag and we can say that a reader can 
read either `inline` or `uri`, but if it chooses `uri` it should verify it with 
`etag`.


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