It was resolved on the epub3 wg telecon to allow zero or more role properties to be attached to these elements. See https://github.com/w3c/epub-specs/issues/1129#issuecomment-808299001 Given the impact on publishers, a fix for this may need to be expedited.
It was resolved on the epub3 wg telecon to allow zero or more role properties to be attached to these elements.
See w3c/epub-specs#1129 (comment)
Given the impact on publishers, a fix for this may need to be expedited.