2022-11-22 UTC
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@Reverecherecher ↩️ I'm not an expert on any of this, of course. To find out the particulars of how standards work, it's worth looking at the docs.
RSS: https://validator.w3.org/feed/docs/rss2.html
ActivityPub:
https://www.w3.org/TR/activitypub/ (twitter.com/_/status/1595182943848128512)