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RE: Technique 7.5.A [priority 2] Check auto-redirect attributes on META elements

From: Michael Cooper <mcooper@cast.org>
Date: Fri, 28 Jan 2000 13:51:11 -0500
To: "Wendy A Chisholm" <wendy@w3.org>, <w3c-wai-er-ig@w3.org>
Message-ID: <NCBBJOMIELMIDGCAPFCIKEFFCOAA.mcooper@cast.org>
I think it's correct. Let me see if I can propose a clearer one (this
combines Techniques 7.4.A and 7.5.A since they're so similar but should be
separate in the doc):

1) If META element has a HTTP-EQUIV attribute whose value is "refresh"
2) Look at value of the CONTENT attribute
3) If string is just a number, this is an auto-refresh page, trigger
Technique 7.4.A.
4) Otherwise, string should be either a URI or a URI and a number separated
from each other by a semicolon. This is an auto-redirect page. If the number
is greater than 0, trigger Technique 7.5.A. If there isn't a number, the
default value is 0 so we don't need to trigger the error.

Note: in the Technique associated with the WCAG checkpoint
(http://www.w3.org/TR/WAI-WEBCONTENT-TECHS/#auto-page-refresh) it does not
mention the presence of the string "URL=" in the value of the CONTENT
attribute. The HTTP1.1 spec doesn't mention REFRESH at all so no help there.
When Chris and I took an early pass through the doc one or the other of us
had found the usage of "URL=", but given the WCAG Technique I'm not sure we
can rely on that as a distinguishing feature, unless we discover they made a
mistake in their example. Perhaps they can point us to the resource they
used when making their example.

By they way, any of the other Techniques you sent out up to now that I
didn't respond to were ones I felt were ok as you described - didn't want to
clutter the list with confirmations.

Michael

> -----Original Message-----
> From: w3c-wai-er-ig-request@w3.org
> [mailto:w3c-wai-er-ig-request@w3.org]On Behalf Of Wendy A Chisholm
> Sent: Friday, January 28, 2000 12:01 PM
> To: w3c-wai-er-ig@w3.org; Michael Cooper
> Subject: Technique 7.5.A [priority 2] Check auto-redirect attributes on
> META elements
>
>
> Michael,
> i updated the algorithm.  is this now correct?
> --wendy
>
> Technique 7.5.A [priority 2] Check auto-redirect attributes on
> META elements
>
> Evaluation:
> If a META element has a HTTP-EQUIV attribute and the value of that
> attribute is "refresh" then check if the element has a 'CONTENT'
> attribute
> with delay greater than 0.
> If the META element has a CONTENT attribute then check if the
> value of that
> attribute is a URL.
> If the CONTENT attribute does have a value of a URL (will contain the
> string "URL=") then it is an auto-redirect page and the HTTP-EQUIV and
> CONTENT attributes should be removed from the META element.
> --
> wendy a chisholm
> world wide web consortium
> web accessibility initiative
> madison, wi usa
> tel: +1 608 663 6346
> /--
>
Received on Friday, 28 January 2000 13:59:43 GMT

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