Peter-Paul Koch has released a new version of his browser event compatibility tables (the last major version dates to 2005) at QuirksMode.org. He has data on IE 5.5, 6, 7, and 8 beta 1; Firefox 2 and 3 beta 5; Safari 3.0 and 3.1 on Windows; Opera 9.26 and 9.5 beta; and Konqueror 3.5.7
During last week's New York Web Standards meetup on the WCAG Samurai errata, the group generated a few questions that no one could answer. Joe Clark, who led the WCAG Samurai, was kind enough to help out.
All of the WCAG Samurai errata we had questions about are listed below, in
. They are organized by WCAG guidelines in bold.
You can download the PowerPoint presentation and listen to the event at this post: NY Web Standards Meetup—WCAG Samurai Errata for Web Content Accessibility Guidelines (WCAG) 1.0, published on 25 April 2008.
Ensure that pages featuring new technologies transform gracefully
A page that uses digital-rights management or copy protection of any kind cannot be claimed to comply with WCAG+Samurai, as its compatibility with adaptive technology and future technologies cannot be independently proven.
While this seems straightforward, none of us could think of an example. Joe Clark suggested an eBook.
Use interim solutions
Do not cause pop-ups or other windows to appear and do not change the current window without informing the user.
Do not add non-link, printable characters (surrounded by spaces or not) between adjacent links unless the semantics of the document naturally would include such characters.
Navigation schemes marked up like this are a no-no:
<li><a href=""></a> Link 1 |</li><br />
<li><a href=""></a> Link 2 |</li><br />
<li><a href=""></a> Link 3</li><br />
Use the CSS pseudo-element
, background images, or borders.
Provide context and orientation information
Do not use frames. (You may use iframes.)
I was curious why
were allowed and wondered how assistive technologies handle them. Joe let me know that assistive technologies handle them "quite well. … Everything inside the
is the alternative content, plus it's inline or block so you can do whatever you want with it."
Do not place distinguishing information at the beginning of headings, paragraphs, lists, etc. unless it is significantly harder to understand the document without it. (We do not define "significantly harder.")
We weren't sure what the WCAG meant by "distinguishing information." According to Joe, the WCAG wanted us to front-load everything (headings, paragraphs), so people wouldn't have to read more than a few words to understand what the meaning.
Hidden structural information (e.g., heading elements positioned offscreen) is permitted when document semantics warrant it.
None of us were familiar with this technique or could think of a reason to hide structural information. Joe suggested Googling "offscreen positioning" accessibility:
- "In cases where we need to hide content from a visitor but still make it available to the screenreader, we position it offscreen."
- Accessibility Tips. "Positioning content offscreen."
- "The advantage of offscreen display for iTV captions it that the captions can be much larger and easier to read. The minor disadvantage is that they will be unfamiliar to most viewers for the first few minutes."
- Joe Clark. "Captioning and iTV."
At the moment, I don't know anything about ARIA, but, according to John, it's currently implemented in Firefox 2 and will be supported to a greater degree in Firefox 3. I was also impressed to learn that the Google Reader team has recently added full ARIA support to their application.
From "Fencing in the habitat—doing things right and getting the accessibility wrong" on Wait till I come! by Chris Heilmann, published on 26 April 2008 at 12:09 AM.
Update 2008-04-29: Chris posted a summary of AbilityNet's Accessibility 2.0 conference on the Yahoo Developer Network blog.
Notes and links from last night's discussion of the WCAG Samurai Errata for Web Content Accessibility Guidelines (WCAG) 1.0 at the New York Web Standards Meetup Group. Thanks to everyone who made it!
- My PowerPoint presentation (PPT, 236 KB)
- My PowerPoint presentation in PDF format (PDF, 188 KB)
- Feedburner podcast link
During the meeting, Lydia mentioned Automated Sync Technologies, a transcription and captioning services she found. They are the best priced, easiest, and most flexible transcription and captioning service she has found. Check out their help page for useful how-to videos.
Lydia also provided the following links on Adobe Flash CS3's captioning component:
- Adobe Flash CS3 accessibility design guidelines
- Captions for Video with Flash CS3 by Tom Green. 4 June 2007
Update 2008-04-30: There is a Q&A from this meetup posted at http://themechanism.com/blog/2008/04/30/wcag-samurai-errata-qa/
Listen to this event
Please contact us if you'd like to present at the June or July meetup.