[whatwg] HTML5: compatible with all legacy Web browsers

[Elliotte Rusty Harold]

Section 1.7:

"The first such concrete syntax is "HTML5". This is the format
recommended for most authors. It is compatible with all legacy Web
browsers."

I challenge the claim that HTML5 is compatible with *all* legacy Web
browsers. I can produce valid HTML 4 documents today that are not
compatible with *all* legacy Web browsers. I suggest this be weakened
to something like "is compatible with most Web browsers still in
active use today".

-- 
Elliotte Rusty Harold
elharo at ibiblio.org