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ARIA spec should distinguish the browser accessibility tree from the platform accessibility tree #2817
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Now that we're formalizing portions of the browser accessibility tree (in WebDriver and Acacia AAM testing), ARIA should distinguish the browser accessibility tree from the platform accessibility tree for cross referencing from those specs.
Spec section: https://w3c.github.io/aria/#accessibility_tree
Originally posted by @cookiecrook in w3c/webdriver#1960 (comment)
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[-]ARIA spec should distinguish the **_browser_** accessibility tree from the **_platform_** accessibility tree[/-][+]ARIA spec should distinguish the browser accessibility tree from the platform accessibility tree[/+]spectranaut commentedon Jun 10, 2026
Also see Jamie's comment on this topic: w3c/webdriver#1960 (comment)
spectranaut commentedon Jun 10, 2026
Or, the "accessibility tree" -- something that both the browsers accessibility tree and platform accessibility tree are concrete implementations of? Or views of? Maybe we can update that definition to make it more clear?
All of these trees need to have basically the same information, and the same rules apply in terms of how to calculate values -- until we get to the AAMs, then there are some differences.