2021-09-21 UTC
# 
@nhoizey ↩️ The attribute value is proprietary, not the attribute.
I think adding link types is ok per https://html.spec.whatwg.org/multipage/links.html#concept-rel-extensions
> Anyone is free to edit the microformats wiki existing-rel-values page at any time to add a type (twitter.com/_/status/1440320232233455619)