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Re: Legacy Doctype and Doctype Versioning

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Wed, 17 Feb 2010 14:27:38 +0100
To: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Cc: Philip Taylor <pjt47@cam.ac.uk>, Julian Reschke <julian.reschke@gmx.de>, Lachlan Hunt <lachlan.hunt@lachy.id.au>, "public-html@w3.org" <public-html@w3.org>
Message-ID: <20100217142738312919.92cf9ded@xn--mlform-iua.no>
Leif Halvard Silli, Wed, 17 Feb 2010 14:17:20 +0100:
> Philip Taylor, Wed, 17 Feb 2010 09:29:43 +0000:
>> Julian Reschke wrote:
>>> On 17.02.2010 10:08, Lachlan Hunt wrote:
>>>> Leif Halvard Silli wrote:
>>>>> Not in Safari 4. In the current version of Safari, this variant of the
>>>>> strict Doctype triggers QuirksMode:
>>>>> 
>>>>> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
>>>>> [<!ATTLIST P myattr CDATA #implied>]>
>>>> 
>>>> This is a bogus DOCTYPE in HTML5 because there is no support for parsing
>>>> the SGML syntax for the internal subset in the HTML serialisation. [...]
>>> 
>>> ...just trying to understand... a DOCTYPE that previously triggered 
>>> standards mode will now (as in FF trunk + HTML5 parser) get you to 
>>> Quirks mode?
>> 
>> Yes, but in pre-HTML5 browsers (IE, Firefox 3.6 without html5.enable, 
>> etc) doctypes will still only be parsed up to the *first* ">", so you 
>> will get the characters "]>" inserted as text into the body of the 
>> document, so today you can't use internal subsets in text/html anyway.
> 
> Firefox and IE do indeed show the "]>". Opera and Konqueror do not. 
> Safari 4 does show it, but since Konqueror does not, then I don't trust 
> that this is a "honest" display. As this test page shows: 
> http://www.målform.no/html4-or-html5/

> 
> The good news is that it is easy to hide that issue - so you _can_ use 
> such Doctypes. As this page shows: 
> http://www.målform.no/html4-or-html5/workaround

> 
> But it is only in Opera 10.5 and Safari - and apparently in Mindefield 
> - that there is a direct link between the "]>" issue and QuirksMode.

And even if you hide the "]>", they are still in QuirksMode.
-- 
leif halvard silli
Received on Wednesday, 17 February 2010 13:28:12 UTC

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