emkornfield commented on code in PR #41257:
URL: https://github.com/apache/arrow/pull/41257#discussion_r1583441040
##########
docs/source/format/CanonicalExtensions.rst:
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@@ -251,6 +251,27 @@ Variable shape tensor
Values inside each **data** tensor element are stored in
row-major/C-contiguous
order according to the corresponding **shape**.
+.. _json_extension:
+
+JSON
+====
+
+* Extension name: `arrow.json`.
+
+* The storage type of this extension is ``StringArray`` or
+ or ``LargeStringArray`` or ``StringViewArray``.
+ Only UTF-8 encoded JSON is supported.
Review Comment:
I think the one thing to consider here as possible future extensions (this
might have already been discussed on ML a while ago), is non-standard encodings
using Binary types instead of String.
In the short term we should probably recommend that implementations should
likely reject Binary annotated JSON fields
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