This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
Synced with text in the spec. Took out host language and author normative provisions. Still need an example for where an author might have good reason to provide a WAI-ARIA role on something that would not normally be repurposed. "Values for roles do not conflict in the same way as values for states and properties (for example, the HTML checked attribute and the aria-checked attribute could have conflicting values), and because authors are expected to have valid reason to provide a WAI-ARIA role even on elements that would not normally be repurpose
Added example of a spin button which is created using a text field with role="spinbutton"