felipecrv commented on code in PR #37877:
URL: https://github.com/apache/arrow/pull/37877#discussion_r1344273074
##########
docs/source/format/Columnar.rst:
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@@ -487,6 +499,102 @@ will be represented as follows: ::
|-------------------------------|-----------------------|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | unspecified (padding) |
+ListView Layout
+~~~~~~~~~~~~~~~
+
+The ListView layout is defined by three buffers: a validity bitmap, an offsets
+buffer, and an additional sizes buffer. Sizes and offsets have the identical
bit
+width and both 32-bit and 64-bit signed integer options are supported.
+
+As in the List layout, the offsets encode the start position of each slot in
the
+child array. In contrast to the List layout, list lengths are stored explicitly
+in the sizes buffer instead of inferred. This allows offsets to be out of
order.
+Elements of the child array do not have to be stored in the same order they
+logically appear in the list elements of the parent array.
+
+When a value is null, the corresponding offset and size can have arbitrary
+values. When size is 0, the corresponding offset can have an arbitrary value.
+If choosing a value is possible, we recommend setting offsets and sizes to 0 in
+these cases.
+
+A list-view type is specified like ``ListView<T>``, where ``T`` is any type
+(primitive or nested). In these examples we use 32-bit offsets where
+the 64-bit offset version would be denoted by ``LargeListView<T>``.
Review Comment:
Yes. I will reinforce it here as well.
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