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Re: XHTML+MathML+SVG

From: olivier Thereaux <ot@w3.org>
Date: Wed, 18 Apr 2007 10:55:05 +0900
Message-Id: <7133427F-B87E-4500-96BD-429A78A0BA68@w3.org>
Cc: www-validator Community <www-validator@w3.org>, www-html-editor@w3.org, Masayasu Ishikawa <mimasa@w3.mag.keio.ac.jp>
To: Jacques Distler <distler@golem.ph.utexas.edu>

Hi Jacques,

I am copying the www-validator mailing-list, which is the proper  
channel for feedback and discussion on the validator. Please send  
your feedback through it in the future: not only does it scale better  
because there are a lot of knowledgeable people on the list, but it's  
also important that it is *archived* and others facing the issue can  
find answers without asking the same questions over and over again.

On Apr 18, 2007, at 00:37 , Jacques Distler wrote:
>
> Can you please explain why the W3C Validator flags
>     http://golem.ph.utexas.edu/~distler/blog/files/validator-svg.xhtml
> as invalid?

Short answer: because it is not valid per the DTD for XHTML+MathML+SVG.

Longer answer: because 1) you're using an invalid construct per this  
profile, and because 2) there is a bug in the published (flattened)  
DTD for the XHTML+MathML+SVG Working Draft.

1) your xlink xmlns is declared on the svg:defs element. The profile  
allows the xlink namespace to be declared only on the svg, html or  
mathml root element, AFAICT. Moving your xmlns:xlink="http:// 
www.w3.org/1999/xlink" to <svg:svg will fix this problem.

2) There is a problem with the declaration of the svg:stop element in  
the flat DTD for XHTML+MathML+SVG. The DTD declares the element  
"stop" as not being prefixed. I think this is a bug, which is not  
shocking - remember, XHTML+MathML+SVG is a *Working Draft*.

Below is a patch for the flat DTD, courtesy of Karl Dubost who helped  
me debug the issue:

--- xhtml-math-svg-flat.dtd     2002-08-08 21:41:02.000000000 +0900
+++ xhtml-math-svg-flat2.dtd    2007-04-18 10:25:04.000000000 +0900
@@ -754,7 +754,8 @@
<!ENTITY % SVG.linearGradient.qname "%SVG.pfx;linearGradient" >
<!ENTITY % SVG.radialGradient.qname "%SVG.pfx;radialGradient" >
-<!ENTITY % SVG.stop.qname "stop" >
+<!ENTITY % SVG.stop.qname "%SVG.pfx;stop" >
+
<!-- module: svg-pattern.mod ........................... -->


> I would not care, but for the fact that I actually USE a local copy  
> of the W3C Validator in my blog software. So, the fact that it  
> flags valid documents as invalid is a PROBLEM for me.

Let me just remind you that the markup validator is open source  
software, free/libre and open to contributions and patches, and its  
distribution terms include:
THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT  
HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED,  
INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR  
FITNESS FOR ANY PARTICULAR PURPOSE [...]


-- 
olivier Thereaux - W3C - http://www.w3.org/People/olivier/
W3C Open Source Software: http://www.w3.org/Status
Received on Wednesday, 18 April 2007 01:55:24 GMT

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