Re: [whatwg] HTML syntax: shortcuts for 'id' and 'class' attributes

----- Original Message ----- 
From: "Ian Hickson" <ian@hixie.ch>
>
> Unfortuntely that wouldn't be backwards compatible, and so isn't really an
> option.
>

Ian, what does this "backward compatibility" mean?

1) HTML5 is backward compatible with HTML4 so any HTML5 aware UA can read 
HTML4 files
without any additional setup. That implies HTML4 is a subset of HTML5.

-or -

2) Any HTML4 aware UA can render HTML5.  That is possible only if HTML5 is 
exactly HTML4 or its subset (but not superset).

What of these is true?

Andrew Fedoniouk.
http://terrainformatica.com

Received on Friday, 1 December 2006 04:46:28 UTC