Moving details from the UA Implementers Guide to the ARIA draft

While reviewing the UA Implementers Guide (http://developer.mozilla.org/En/ARIA_User_Agent_Implementors_Guide), we realized that Aaron has written a good paragraph about roles that is probably better placed in the ARIA draft. Perhaps Section 2.1. WAI-ARIA Roles is a good place for it.

Here's the text:


In ARIA, the role attribute may indicate more than one role. The role

value is an ordered set of space-separated tokens where each token must

be a valid role token. ARIA includes some roles, such as landmarks and

advanced widgets, that are not traditionally part of accessibility APIs.

In addition, future versions of ARIA may allow for author-defined roles

to be used in the role string. In that case, it is expected that a

fallback role may be provided after the custom role, in the role string.

What do you think about this addition?