pitrou commented on code in PR #37166:
URL: https://github.com/apache/arrow/pull/37166#discussion_r1347404051
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docs/source/format/CanonicalExtensions.rst:
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@@ -148,6 +148,109 @@ Fixed shape tensor
by this specification. Instead, this extension type lets one use fixed shape
tensors
as elements in a field of a RecordBatch or a Table.
+.. _variable_shape_tensor_extension:
+
+Variable shape tensor
+=====================
+
+* Extension name: `arrow.variable_shape_tensor`.
+
+* The storage type of the extension is: ``StructArray`` where struct
+ is composed of **data** and **shape** fields describing a single
+ tensor per row:
+
+ * **data** is a ``List`` holding tensor elements of a single tensor.
+ Data type of the list elements is uniform across the entire column.
Review Comment:
```suggestion
* **data** is a ``List`` holding tensor elements (each list element is
a single tensor). The List's value type is the value type of the tensor,
such as an integer or floating-point type.
```
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