2017-05-27 UTC
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gRegorLove Huh, interesting. I just noticed php-mf2 and mf2py include "alternates" object but it's not on /microformats2_parsing. Appears it was dropped from the spec in favor of rel-urls 2 years ago: http://microformats.org/wiki/microformats2-parsing-issues#drop_alternates_collection