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RE: Problems with IE

From: Bernhard Keil <Bernhard.Keil@soft4science.com>
Date: Tue, 11 Jan 2005 20:17:57 +0100
To: "'Robert Miner'" <RobertM@dessci.com>
Cc: <davidc@nag.co.uk>, <www-math@w3.org>
Message-ID: <E1CoRwE-0006u3-TJ@frink.w3.org>

Hi Robert,
Office2003 can be excluded, it was already installed when
the "problem mashine" was working and it is also installed
on the "working mashine".

Also there does not seem to be any filter for xml or dtd's
in the registry. 

I isolated the problem so far:

-The stylesheet pmathml.xsl does definitely not cause any problem
-The source file does not cause the problem
-The MIME Type for the xml source file is ok

I copied a binary identical DTD to soft4science.com and
referencing this DTD works while referencing the DTD
on w3.org does not work.

The only difference is that IE determines a differnt
MIME Type for the DTD.
The one served from w3.org will be identified as type "Document Type Definition",
the one from soft4science.com as "XML Document".

Obviously the mime type for the DTD causes, 
at least on my "problem mashine", the 
different behavior of  IE's built-in xml parser (or xslt processor).


-----Original Message-----
From: www-math-request@w3.org [mailto:www-math-request@w3.org] On Behalf Of Robert Miner
Sent: Tuesday, January 11, 2005 7:55 PM
To: Bernhard.Keil@soft4science.com
Cc: davidc@nag.co.uk; www-math@w3.org
Subject: Re: Problems with IE

Hi Bernhard,

You wrote:

> Its definitely not the source file, as the same error occurs with this minimal XHTML+MathML document:
> <?xml version="1.0" encoding="UTF-8"?>
> <?xml-stylesheet type="text/xsl" href="http://www.w3.org/Math/XSL/pmathml.xsl"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN"  "http://www.w3.org/Math/DTD/mathml2/xhtml-math11-f.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml">
>   <head>
>     <title></title>
>   </head>
>   <body>
>   </body>
> </html>
> I dont understand it, as it worked before since at least 12 month
> and it still workes on my other computer (except that this error occurs very, very seldom).
> Nevertheless, I might try anaylizing the stylesheet and the DTD as you suggested.

Did you perhaps just install Office 2003 on the problem machine?  We
discovered that Office 2003 installs a filter that sniffs text/xml
documents, and presumably does something to Office XML documents.  We
found out about it since it overwrites MathPlayer's filter, which
attempts to sniff out XHTML+MathML documents.  MathPlayer is not
supposed to filter any document with a stylesheet PI, so I doubt it is
the problem, but I guess the MathPlayer filter could have some bug

Anyway, if a filter does have a bug affecting plane 1 characters, then
by the time the XSL tranform tries to run, the source has already been
corrupted. The corruption would only be in the copy in memory -- view
source, etc wouldn't show it.  The fact that the bad characters from
the error message don't appear in the source, stylesheet or DTD make
it sound as if some piece of software is corrupting the document in
memory, which lead me to think of filters.

To eliminate MIME filters as a possible cause of the problem, check
your registry.  The MIME filters are listed in 


You can turn off any text/xml filtering by deleting the text/xml
subkey (after saving it, naturally, in case you want to put it


Dr. Robert Miner                                RobertM@dessci.com
W3C Math Interest Group Co-Chair                      651-223-2883
Design Science, Inc.   "How Science Communicates"   www.dessci.com
Received on Tuesday, 11 January 2005 19:44:22 UTC

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