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Re: XLink namespace prefix

From: Chris Lilley <chris@w3.org>
Date: Mon, 26 Apr 2010 13:02:31 +0200
Message-ID: <1109890924.20100426130231@w3.org>
To: Johannes Roessel <johannes.roessel@uni-rostock.de>
CC: "www-svg@w3.org" <www-svg@w3.org>
On Monday, April 26, 2010, 11:09:02 AM, Johannes wrote:

JR> Hello,

JR> In tracing an issue yesterday why a specific SVG image won't
JR> render in some renderers I noticed that it used the namespace
JR> prefix “l:” for XLink instead of the more common “xlink:”. SVG
JR> being XML, this shouldn't be much of a problem, theoretically.

Correct

JR> However, the W3C validator complains about that too 

A DTD-based validator is not namespace aware and will therefore treat namespace declarations as attributes.

The problem is with DTD technology, not your code.

JR> and several
JR> SVG renderers, including rsvg and IE 9 Preview won't render the
JR> image when the namespace uses a prefix different from “xlink:”.

Interesting report, particularly for IE9 (I was aware of rsvg).

JR> I didn't find anything in the specification that discourages or
JR> forbids the use of other namespace prefixes. 

You won't.

JR> Is there anything on
JR> that? If the prefix doesn't *have* to be “xlink:”, then perhaps a
JR> test case for that behavior might be good to have, considering
JR> that several renderers have problems with that.

Yes. This is tested by struct-frag-05-t.svg
http://dev.w3.org/SVG/profiles/1.1F2/test/harness/htmlObject/struct-frag-05-t.html

-- 
 Chris Lilley                    mailto:chris@w3.org
 Technical Director, Interaction Domain
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG
Received on Monday, 26 April 2010 11:02:46 GMT

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