These properties are on track for ARIA 1.3. Browser support includes Gecko, WebKit and Chromium. (See also the 1.3 overview issue https://github.com/w3c/aria/issues/1331 for more links to various bits and pieces.)
It would be very helpful for the ARIA WG to know whether these may be supported.
The ARIA Editors' Draft proposes the aria-braillelabel and aria-brailleroledescription property, see also https://w3c.github.io/aria/#aria-braillelabel, https://w3c.github.io/aria/#aria-brailleroledescription.
These properties are on track for ARIA 1.3. Browser support includes Gecko, WebKit and Chromium. (See also the 1.3 overview issue https://github.com/w3c/aria/issues/1331 for more links to various bits and pieces.)
It would be very helpful for the ARIA WG to know whether these may be supported.