In the DPUB specifications, certain DPUB roles, like doc-backlink, include duplicate attributes (such as aria-disabled and aria-haspopup). This occurs because specific attributes are allowed, but the deprecated global attributes were mistakenly retained, even though they are not applicable to the specific role.

Full list of DPUB roles with this behaviour:

• doc-backlink
• doc-biblioref
• doc-glossref
• doc-noteref
• doc-pagebreak (differently from WAI-ARIA specs, required attributes are in the same cell of other attributes)