# HierarchyRowMeta

> _Since v3.9.0_

Position of a flattened row in the hierarchy, as announced through
`aria-level` / `aria-setsize` / `aria-posinset`.

## Properties

| Property | Type | Description |
| -------- | ---- | ----------- |
| <span id="level"></span>`level` | <code>number</code> | 1-based nesting level (`aria-level`). |
| <span id="setsize"></span>`setSize` | <code>number</code> | Number of siblings in the row's list (`aria-setsize`). |
| <span id="posinset"></span>`posInSet` | <code>number</code> | 1-based position among its siblings (`aria-posinset`). |