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[whatwg] W3C compatibility

From: Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>
Date: Mon, 12 Feb 2007 14:01:10 +0000
Message-ID: <1171288870.7386.166.camel@galahad>
Henri Sivonen wrote:

> What's there in XHTML5 that would require breaking XHTML1 support (in  
> practice, predefined class names don't break practice)?

That depends on whether any behaviour/presentation is specified for
class names.

Any AT or talking browser relying on <abbr> vs <acronym> as a
pronunciation guideline is going to be broken by XHTML5's ditching of
<acronym>:

http://www.sidar.org/funacti/inves/resul.php

Likewise, any document mapping using <h1> to <h6> to build hierarchies
in a simple manner is going to be thrown by XHTML5's reuse of such
headings for subtitles and by markup like:

<body>
 <h4>Apples</h4>
 <p>Apples are fruit.</p>
 <section>
  <h2>Taste</h2>
  <p>They taste lovely.</p>
  <h6>Sweet</h6>
  <p>Red apples are sweeter than green ones.</p>
  <h1>Color</h1>
  <p>Apples come in various colors.</p>
 </section>
</body>

to use an example out of the spec.

--
Benjamin Hawkes-Lewis
Received on Monday, 12 February 2007 06:01:10 UTC

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