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[Bug 15359] Make BOM trump HTTP

From: <bugzilla@jessica.w3.org>
Date: Tue, 27 Nov 2012 14:15:48 +0000
To: www-international@w3.org
Message-ID: <bug-15359-4285-8FxrGUFWTk@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=15359

--- Comment #28 from Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no> ---
(In reply to comment #27)
> (In reply to comment #22)

> > Has anyone actually discussed Anne's
> > proposal with the CSS and XML people?
> 
> CSS Level 3 gives the BOM precedence (implemented in WebKit, Presto and
> Gecko). Test case:
> http://hsivonen.iki.fi/test/moz/bom/no-charset-attribute.html1251
> 
> For JS, Gecko experienced incompatibility with deployed content when not
> giving the BOM the precedence in the case of JS, so I fixed Gecko to give
> the BOM the precedence in the JS case.
> 
> Frankly, XML should just follow HTML, CSS and JS behavior for consistency.
> The worst that can happen is that previously ill-formed docs become
> well-formed. If someone has a problem with that, I suggest they fight the
> 5th edition first.
> 
> I think this bug should go back into the resolved state without spec changes.

CSS- and JavaScript-files are comparable to external entities in XML, for which
XML 1.0 requires the use of the BOM, even for UTF-8 texts, if the replacement
text of the external entity is to begin with U+FEFF.

Clearly, the justification for that special rule, is a realization of the fact
that when a zero with no-break space character occurs as the first character in
a plain-text text, then, in a markup language that is biased towoards
Unicode/UTF-8/UTF-16, then - in a conforming parser, the first such character
*will* be interpreted as a byte order mark.

Thus it isn't necessarily HTML that invented the wheel, here ...

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Received on Tuesday, 27 November 2012 14:16:03 GMT

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