Hi Rich ben wrote: "Where does the WAI-ARIA spec define valid role tokens, though?" looks like *XHTML Vocabulary <http://www.w3.org/1999/xhtml/vocab/> - defines list of allowable role tokens.* * * *Is that correct?* * * *regards* *Steve* On 27 January 2012 18:23, Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com > wrote: > On Fri, Jan 27, 2012 at 3:53 PM, Richard Schwerdtfeger > <schwer@us.ibm.com> wrote: > > The role attribute describes the role the current element plays in the > context of the document. The attribute takes as its value one or more > space-separated-tokens representing its role(s). The attribute describes > the role(s) the current element plays in the context of the document. This > can be used, for example, by applications and assistive technologies to > determine the purpose of an element. This could allow a user to make > informed decisions on which actions may be taken on an element and activate > the selected action in a device independent way. A valid-role-token is > defined by [WAI-ARIA]. > > Seems reasonable. Where does the WAI-ARIA spec define valid role tokens, > though? > > For example, how would an HTML conformance checker determine if > "accordion" is a valid role token? > > The spec defines some roles, but also says user agents may extend them > with new roles and that future specs will define how to use these new > roles interoperably. It does say that "Content authors MUST NOT use > abstract roles because they are not implemented in the API binding". > > Should HTML conformance checkers: > > 1. Allow any token that is not an abstract role defined in WAI-ARIA > (e.g. allow "accordion" and "checkbox" but forbid "input"? > > 2. Reject any token that is an abstract role defined in WAI-ARIA and > additionally require the token list to begin with a concrete role > defined in WAI-ARIA (e.g. allow "accordion" and "checkbox" but require > "checkbox" to come first). > > 3. Reject any token that is not a concrete role defined in WAI-ARIA > (e.g. reject "accordion" and "input" whereever they occur in the token > list)? > > Whichever way, it would probably be best to be explicit. > > -- > Benjamin Hawkes-Lewis > -- with regards Steve Faulkner Technical Director - TPG www.paciellogroup.com | www.HTML5accessibility.com | www.twitter.com/stevefaulkner HTML5: Techniques for providing useful text alternatives - dev.w3.org/html5/alt-techniques/ Web Accessibility Toolbar - www.paciellogroup.com/resources/wat-ie-about.html
Received on Saturday, 28 January 2012 09:05:32 UTC