Last modified: 2011-11-07 18:43:34 UTC
Allowing WAI ARIA markup in wikitext <http://www.w3.org/WAI/intro/aria> would make it easier to make content accessible to people using screen readers, text-only browsers, etc. For example, this would make it possible to mark tables that are used purely for layout (as on portal pages, warning boxes, etc) as "presentational" (compare bug 24583).
bug 18338 is related, but it deals with interface messages / skin code, as opposed to content generated from wiki text.
We should be cautious when adding markup to wikitext as it is often misused. And the more markup we have the more it will be complicated to edit. Adding ARIA in markup is not a priority now. Given the state of the english-speaking accessibility project, of the french accessibility project and the lack of accessibility projects in other languages: at best ARIA markup will simply not be used by editors. However, it might become necessary later on.