Some ARIA Comments

1. This text seems odd for the Introductiion:
"Roles are element types and should not change with time or user 
actions. Changing the role on an element from its initial value will 
likely be treated by accessibility API events as the removal of the old 
element and insertion of a new element with the new role."

2. Aside: section 2.4 interesting from ATAG perspective

3. Is this right?
4.2.2. Required States and Properties
RDF Property
role:supportedState

4. "Presentation" might be ambiguous - maybe "non-informative" would be 
more clear

5. An "incomplete" role might be useful

6. "8.3.1. Authoring Tools" is a little thin - maybe might mention 
supporting toolkits with built-in ARIA support?

7. Do "9.1 Implentations" need to be in the spec?

8. Glossary entries that differ with ATAG2:
- Assistive Technology
- Element
- relationships
-role

9. Glossary entries that are relatively similar to ATAG2:
- Normative
- Informative
-User agent

10. This seemed like an interesting issue:
http://lists.w3.org/Archives/Public/wai-xtech/2009Apr/0002.html


Cheers,
Jan

-- 
Jan Richards, M.Sc.
User Interface Design Lead
Adaptive Technology Resource Centre (ATRC)
Faculty of Information (i-school)
University of Toronto

   Email: jan.richards@utoronto.ca
   Web:   http://jan.atrc.utoronto.ca
   Phone: 416-946-7060
   Fax:   416-971-2896