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Re: Re : Influence of valid code on screen readers

From: Tina Holmboe <tina@greytower.net>
Date: Mon, 20 Jun 2005 23:34:38 +0200 (CEST)
Message-Id: <200506202134.j5KLYdFU022234@asterix.andreasen.se>
To: w3c-wai-gl@w3.org

On 19 Jun, Maurizio Boscarol wrote:

> Valid code does not mean well structured code. We are always 
> counfounding this two things.

  I agree that this is confusing; let's see if we can't clear it up.

    * Valid code means well structured code. That's what syntax checking
      markup does: testing to see whether elements are correctly nested,
      whether elements are placed inside appropriate other elements, and
      so forth.

    * Valid code does NOT, however, mean *appropriate* structure. It's
      fully possible to write a document which is syntactically correct
      but semantically void; not to mention valid but with entirely
      inappropriate structure.

  However: valid code means valid structure. This is a fact of the way
  SGML-based markup languages work, and we need to accept it.

> I don't agree, because validity issues that can be automatically
> tested are often issues that aren't related with accessibility.

  They certainly are - I still remember that unclosed A which made the
  entire document one huge link. A quick validation would have caught
  that issue, and saved quite abit of trouble. The author in that case
  was an instant convert, you might say :)


> But if we cannot know if validity massess with accessibility, we
> cannot put it in p1.

  But we must. We know this: invalid code MAY lead to a situation
  where the user *cannot access the information at all*; this is - or
  was - a criteria for p1.

  Remember the example I mentioned; the unclosed A. That is a
  showstopper as far as access to the content is concerned.

 -    Tina Holmboe                    Greytower Technologies
   tina@greytower.net                http://www.greytower.net/
   [+46] 0708 557 905
Received on Monday, 20 June 2005 21:34:45 UTC

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