In case no one has mentioned this, changing the DOCTYPE has a pretty 
huge effect on how CSS gets rendered. Wikimedia's current DOCTYPE (XHTML 
transitional) maps to "almost standards mode" or "limited quirks mode" 
in Firefox, Safari, Chrome, Opera, IE8 and IE9. Changing to "<!DOCTYPE 
html>" will switch the rendering mode in all of those browsers to 
"standards mode". Testing and tweaking all the CSS in Mediawiki for this 
DOCTYPE change is a huge task. I'm already getting bug reports due to 
this issue, and I wasn't even aware we were making the change.

The switch to <!DOCTYPE html> should be reverted immediately. If we want 
to switch to this DOCTYPE, we need to plan and budget for the front-end 
development that will be necessary to support this change.

How exactly was the conclusion reached that this change would only 
affect screen-scraping tools? The MediaWiki page on the HTML5 transition 
lists several other issues, none of which seem to have been adequately 
discussed or addressed.

Ryan Kaldari


On 3/22/11 9:35 AM, Chad wrote:
> On Tue, Mar 22, 2011 at 12:25 PM, Max Semenik<maxsem.w...@gmail.com>  wrote:
>> As the matter of fact, MediaWiki serves HTML5 by default. The only
>> reason why it is still not enabled on Wikipedia is backward
>> compatibility with numerous screen-scraping scripts/tools. However,
>> they had their last warning recently - HTML5 was briefly enabled a
>> couple of times and there's no guarantee that next time it will not
>> stick :D
>>
> Was a date given for that? I might've missed it.
>
> -Chad
>
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