|<- [[het:Other semantic elements]]|[[het:Challenge - Adding sectioning content]] ->|

w3.org/TR/wai-aria

landmark roles

<main role="<role>">


w3.org/TR/2014/WD-aria-in-html-20140626
https://www.paciellogroup.com/blog/2013/02/using-wai-aria-landmarks-2013/