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Re: html 5 and accessibility issue - need of fallback content

From: Simon Pieters <simonp@opera.com>
Date: Sun, 01 Jul 2007 13:30:34 +0200
To: "Lachlan Hunt" <lachlan.hunt@lachy.id.au>, aurélien levy <aurelien.levy@free.fr>
Cc: public-html@w3.org
Message-ID: <op.tur9881cidj3kv@hp-a0a83fcd39d2>

On Sun, 01 Jul 2007 12:40:55 +0200, Lachlan Hunt  
<lachlan.hunt@lachy.id.au> wrote:

> There are various possible solutions that could be considered:
> * <noembed>
>    - pro: I think it works in some UAs already (need to test it).
>    - con: no direct association with the specific embed element.

<noembed> is a mechanism to show content for UAs that don't support  
<embed> (or when plugins are disabled in the UA), just like <noframes> is  
for UAs that don't support frames. It is not fallback content for when  
there is no plugin or in the case of a 404 (like e.g. <object> is).

> [...]
> * <embed alt="">
>    - pro: works in Opera already
>    - con: doesn't seem to work in other UAs (need to test).

Works in Lynx too, FWIW.

> [...]

Another option:

  * Use the fallback as HTML, then check if the right plugin exists with
    script, and replace the fallback with an <embed> or <object>.
     - pro: works already
     - con: removing the fallback from the DOM takes away the opportunity
            for e.g. AT to use it instead of the plugin content
     - con: requires scripting

Simon Pieters
Opera Software
Received on Sunday, 1 July 2007 11:31:34 UTC

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