Accessibility: ARIA role doc-endnote is deprecated.

[mejiaj]

doc-backlink, doc-endnote, doc-endnotes, and doc-noteref should be removed and instead rely on native semantic elements like <ol>, <ul>, and <li>.

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If you run the ARIA validator extension in Chrome on a page like:
https://designsystem.digital.gov/next/introduction/

You'll get the following:

Per DPUB-ARIA 1.0 Recommendation:

23-July-2020: Deprecated the doc-biblioentry and doc-endnote roles due to the inability of them to be recognized as children of list. See issue 15.

You can view the full changelog here: https://w3c.github.io/dpub-aria/#changelog

[BryceStevenWilley]

doc-backlink, doc-endnote, doc-endnotes, and doc-noteref should be removed and instead rely on native semantic elements like <ol>, <ul>, and <li>.

The dpub ARIA 1.1 working draft that you linked does mention that doc-endnote is deprecated, but it doesn't seem to mention the other roles (doc-backlink, doc-endnotes, and doc-noteref) as being deprecated at all.

The ARIA validator extension hasn't been updated since 2014, and it's code.google.com repo links to a newer chrome extension, which itself is deprecated and links to lighthouse's accessibility audit. Given that dpub-aria was first released in 2016, I don't think the aria validator extension would know about these roles, and would incorrectly mark them as "not existing".

Removing doc-endnote would be simple, but I'm personally not sure how it's currently being used by accessibility technologies, and when it's deprecation would change from being a working draft to a W3C recommendation.