pitrou commented on code in PR #51102:
URL: https://github.com/apache/arrow/pull/51102#discussion_r3970339507


##########
docs/source/format/Other.rst:
##########
@@ -18,17 +18,26 @@
 Other Data Structures
 =====================
 
+.. deprecated::

Review Comment:
   We have `MetadataVersion` which is more about recording incompatible changes 
to the IPC format (currently at V5), and more informal [format 
versions](https://github.com/apache/arrow/blob/a811bcd6b50755cc489ee43d8ede70cc8b9a7a25/format/Schema.fbs#L20-L27)
 which record additions to the Schema definitions.
   
   (the "format version" is not recorded in the serialized IPC metadata, which 
would perhaps annoy some Parquet contributors :upside_down_face: )
   



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