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Re: <spoiler> element

From: Laurens Holst <lholst@students.cs.uu.nl>
Date: Fri, 09 Dec 2005 23:48:31 +0100
Message-ID: <439A09BF.5000801@students.cs.uu.nl>
To: Anne van Kesteren <fora@annevankesteren.nl>
Cc: W3C HTML List <www-html@w3.org>

Anne van Kesteren schreef:
>>> They tried this more or less with SVG. It seems that nobody really 
>>> understood
>>> the concept of namespaces. Lots of ocntent out there uses 
>>> xlink:href="" where
>>> xlink is bound to no namespace. The leading product simply assumes 
>>> that it is
>>> bound to http://www.w3.org/1999/xlink ignoring the fact that the 
>>> document is
>>> non namespace-well-formed.
>> Oh, what a nonsense! SVG documents are seldom hand-authored, so 
>> no-one ever deals with xlink.
> The people who wrote the SVG authoring tools had to deal with XLink. 
> The people
> who do handwrite SVG have to deal with it. And both mostly fail. I'm 
> not sure
> what your point regarding "nonsense" is as I'm simply telling what Opera
> encountered and I believe Mozilla encountered as well.
> That there is one implementation based on the fact that the DTD presets
> xmlns:xlink and xmlns, well... The documents do validate, for example...

Well, yes, they should never have done that. But that’s another issue.

>> No, the cause of the abuse of the xlink prefix is *exactly* that the 
>> leading product doesn’t have a proper XML parser (fyi: it accepts 
>> more things that are invalid XML, such as <circle> without closing 
>> /), and that because of that authoring tools can (and do) get away 
>> with generating invalid XML. The whole point of XML having strict 
>> error handling is to avoid problems like this.
> So what again was nonsense? I believe I pointed this out...

My impression was that you were talking about hand-authoring of XLink. 
Hand-authoring would often be the case for XHTML, and I agree that 
generally people know too little about namespaces to properly apply them.

However, I think the comparison with Adobe’s SVG implementation is off, 
the situation is quite different. It’s is not an authoring problem. At 
least from UA implementors I would expect them to understand such basic 
XML concepts, and I really can’t understand how the Adobe SVG reader’s 
current situation could ever arise. The fact that authoring tools (or 
the occasional hand-author) generate non-well-formed XML is not caused 
by namespaces, but by the broken parser implementation of such a mayor 
player and by the specification having the SVG and XLink namespaces be 
implied in the DTD.

Anyways, as I said above, for the case of XHTML I absolutely agree with 
you that having to use different namespaces in common markup is not a 
good idea.


Ushiko-san! Kimi wa doushite, Ushiko-san!!
Laurens Holst, student, university of Utrecht, the Netherlands.
Website: www.grauw.nl. Backbase employee; www.backbase.com.
Received on Friday, 9 December 2005 22:50:21 UTC

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