W3C home > Mailing lists > Public > www-style@w3.org > December 2006

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

From: Andrew Fedoniouk <news@terrainformatica.com>
Date: Thu, 30 Nov 2006 20:46:13 -0800
Message-ID: <003401c71503$a1562110$0901a8c0@TERRA>
To: "Ian Hickson" <ian@hixie.ch>
Cc: <www-style@w3.org>

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

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