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RE: About tests 37-41 (headers) *wkey

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Thu, 4 May 2006 13:49:16 -0500
To: "'Chris Ridpath'" <chris.ridpath@utoronto.ca>, "'Loretta Guarino Reid'" <lguarino@adobe.com>, "'Johannes Koch'" <koch@w3development.de>, "'WCAG'" <w3c-wai-gl@w3.org>
Message-ID: <00b701c66fab$72890170$ee8cfea9@NC6000BAK>
The easier way to understand all this is to first look at technique 

G134: Validating Web units.

 

The test procedure for G134 is:

For HTML, SGML-based and XML-based technologies:

   1. Load each page or document into a validating parser.

   2. Check that no validation errors are found.

 

Expected Results

For HTML, SGML-based and XML-based technologies:

Step 2 is true.

 

 

So for G134 (which is a "sufficient" technique for 4.1.1) your question of
"must the page validate" would have the following answers.  

 

To pass the technique? - yes, it is required to pass this technique.

To meet SC 4.1.1" - no, it is not required but it is sufficient.

To conform to WCAG 2.0? - no, it is not required but it is sufficient to
meet SC 4.1.1 .

 

------ 

 

As for H74, the test procedure for this technique is

 

Procedure (For H74)

   1. Check that all id attribute values are unique.

   2. Check that there are closing tags for all elements with required
closing tags.

   3. Check that there are no closing tags for all elements where closing
tags are forbidden.

   4. Check that opening and closing tags for all elements are correctly
nested.

 

Expected Results

Steps 1, 2, 3 and 4 are true.

 

This opens the question of whether the title is accurate on the technique. 

 

But, like G134, 

IF this technique did require validation 

and IF this technique were listed as a sufficient technique, 

the answer to your question for H74 would be: 

 

Is validation required to pass the technique? - yes, it is required to pass
this technique.

Is validation required to meet SC 4.1.1" - no, it is not required but it is
sufficient.

Is validation required to conform to WCAG 2.0? - no, it is not required but
it is sufficient to meet SC 4.1.1 .

 

 


IF this technique did require validation 
and If it was NOT listed as a sufficient technique 
then the answers would be 


 

Is validation required to pass the technique? - yes, it is required to pass
this technique.

Is validation required to meet SC 4.1.1" - no, it is not required AND it is
not sufficient by itself to meet SC 4.1.1.

Is validation required to conform to WCAG 2.0? - no, it is not required AND
it is not sufficient by itself to meet SC 4.1.1 

 

 

Does this help?

 

Sorry for answering your question with all the If statements - but in lookng
at 4.1.1 I notic e two things

1)    the title and test for H74 do not agree with each other

2)    H74 looks like it is a technology specific technique for the
sufficient technique-combination #1 but it is written up like it is a
technique for Sufficient #2 (though that one has no "using a technology
specific technique below" clause.  

 

So those need to be cleaned up.   It doesn't really affect the answers to
your question though I don't think. 

 

Gregg

 

 -- ------------------------------ 

Gregg C Vanderheiden Ph.D. 

Professor - Ind. Engr. & BioMed Engr.

Director - Trace R & D Center 

University of Wisconsin-Madison 

The Player for my DSS sound file is at http://tinyurl.com/dho6b 

 

-----Original Message-----
From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On Behalf
Of Chris Ridpath
Sent: Thursday, May 04, 2006 1:11 PM
To: Loretta Guarino Reid; Johannes Koch; WCAG
Subject: Re: About tests 37-41 (headers) *wkey

 

 

> H75: Ensuring that all id attribute values are unique for the document AND

> that the Web unit is well-formed

> 

OK. This looks clear but it only applies to XML. So all XML documents must 

be, at least, well formed.

 

But now on to H74 which applies to only HTML and XHTML:

"Ensuring that all id attribute values are unique for the document AND that 

opening and closing tags are used according to specification"

 

The "used according to specification" text must mean the tags must validate.


I think it also means there must be a specification (DTD) present in the 

document.

 

The text "opening and closing tags" must mean all tags in the document. (Can


a tag be anything other that an opening or closing tag?).

 

So does this mean that all HTML and XHTML documents must have a DTD and 

validate?

 

Chris

 

 
Received on Thursday, 4 May 2006 18:49:52 GMT

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