On Thu, 06 Aug 2009 19:49:45 +0200, Elliotte Rusty Harold <[email protected]> wrote:

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 guess it depends on the definition of "compatible".


I can produce valid HTML 4 documents today that are not
compatible with *all* legacy Web browsers.

That's irrelevant. Can you produce valid HTML5 documents today that are not compatible with all legacy Web browsers?

I guess the following is an example of a valid HTML5 document that is incompatible with legacy Web browsers:

   <!doctype html>
   <title></title>
   <svg><script/></svg>
   <p>Hello world</p>


I suggest this be weakened
to something like "is compatible with most Web browsers still in
active use today".

What is it that is not compatible with which browser?

--
Simon Pieters
Opera Software

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