Am 07.11.2012 15:48 schrieb Jukka K. Korpela:
I suppose that the heuristics would include recognizing a <div> element to which class "main" has been assigned. Then one could argue that <main> is not needed, as authors can keep using <div class="main">, as millions of pages use.
I doubt that this is useable for that kind of heuristics anyway - as there is no standard for this, "main" as a class name may indicate the main contents, but also a main container to center the whole page. Also, non-english speaking coders may use their own language words as id or class names.