rouault commented on code in PR #41257:
URL: https://github.com/apache/arrow/pull/41257#discussion_r1573896963
##########
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.
+
+* Extension type parameters:
+
+ This type does not have any parameters.
+
+* Description of the serialization:
+
+ Metadata is either an empty string or a JSON string with an empty object.
+ In the future, additional fields may be added, but they are not required
+ to interpret the array.
Review Comment:
> 1. Parsing options that describe what features were used to generate the
JSON. E.g. trailing commas allowed, unquoted field names, etc
ouch, I wouldn't call JSON with trailing commas, or unquoted field names
JSON. Perhaps it would be wise to specify that JSON here is the one of
https://www.json.org/json-en.html , that is ECMA-404 , otherwise that would
defeat the purpose of interoperability between implementations
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