W3C home > Mailing lists > Public > public-html@w3.org > February 2010

Re: Legacy Doctype and Doctype Versioning

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Wed, 17 Feb 2010 14:17:20 +0100
To: Philip Taylor <pjt47@cam.ac.uk>
Cc: Julian Reschke <julian.reschke@gmx.de>, Lachlan Hunt <lachlan.hunt@lachy.id.au>, "public-html@w3.org" <public-html@w3.org>
Message-ID: <20100217141720112030.f18aa46a@xn--mlform-iua.no>
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:
>>>> [<!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: 

The good news is that it is easy to hide that issue - so you _can_ use 
such Doctypes. As this page shows: 

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.
leif halvard silli
Received on Wednesday, 17 February 2010 13:17:57 UTC

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