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RE: [VE][388] Error Message Feedback

From: Jan Christian Anker <jc.anker@anker-zemer.no>
Date: Sat, 13 May 2006 18:25:56 +0200
Message-ID: <C4E8541478181743A6E778EF24B892E60D2A29@EXCHANGE>
To: Lachlan Hunt <lachlan.hunt@lachy.id.au>
Cc: www-validator@w3.org
Thanks, this was a step forward!


Here are the first lines of the document:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"




<meta http-equiv="content-type" content="text/html;

charset=iso-8859-1" />

<meta name="Author" content="ANKER-ZEMER Engineering

AS, webmaster: J.C. Anker" />


<style type="text/css">


<link href="sr1960.css" rel="stylesheet" type="text/css" />



And this I get when I validate:

The document located at <http://www. ... was checked and found to 

be valid XHTML 1.0 Transitional. This means that the resource in 

question identified itself as "XHTML 1.0 Transitional" and that 

we successfully performed a formal validation using an SGML or 

XML Parser (depending on the markup language used).


So, I think I have learnt something!


Sincerely Yours,

Jan Christian Anker



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-----Original Message-----
From: Lachlan Hunt [mailto:lachlan.hunt@lachy.id.au] 
Sent: 13 May, 2006 16:52
To: Jan Christian Anker
Cc: www-validator@w3.org
Subject: Re: [VE][388] Error Message Feedback


Jan Christian Anker wrote:

> However, if clicking on an icon yields 36 warning messages for a 100% 

> correctly written line of coding,


This comment:

<!-- ----------------- Text etc goes here ----------------- -->


is technically valid in HTML 4.01 and other SGML based languages, though 

its use is not recommended.  If you were using an HTML 4.01 DOCTYPE, you 

would not see any errors, but note that adding just one more hyphen 

could easily make it invalid HTML.


However, it is most certainly invalid in XHTML.  The fact that you are 

seeing "warnings" about this means you must be using XHTML and the fact 

that you think it's ok, means you're using the wrong MIME type too.


This is a problem in XHTML because that comment is not well-formed and, 

if you were using the correct MIME type, browsers would use an XML 

parser and immediately stop parsing when they encountered it.  In fact, 

the validator should be issuing errors for this, not warnings, but this 

is one of its many limitations with XML, due to its origin as an SGML 



You can see this for yourself if you like.  The easiest way, if you are 

testing from your local file system, is to give the file a .xml or 

.xhtml extension, then load it up in a browser that supports XHTML.  If 

you need to test from a web server, then it involves sending the correct 

MIME type in the HTTP headers: either application/xhtml+xml or 



(Note: that does not involve changing the value of a certain meta 

element that is commonly misused for such purposes.)



Lachlan Hunt

Received on Saturday, 13 May 2006 15:21:52 UTC

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