name and description computation

[richschwer]

The spec. does not say what to do when an ARIA role is encountered. For example, the ARIA spec. refers to using name from content in some roles and accessible name and description state how to compute the name and description when dealing with name from content and no aria-labelledby or aria-describedby are provided. The HTML spec. limits the use of ARIA name and description spec. to when aria-labelledby and aria-describedby are are applied. That is insufficient. It also must do it for when aria roles are applied that do not conflict with the host language.

[stevefaulkner]

will add a note to reflect the the contexts in which the core spec applies