| ERROR | invalid digit ~c in character reference |
| CAUSE | An invalid digit was found in a character reference. |
| ACTION | Character references are either &#DDD; where Ds are decimal digits, or &#xHHH; where Hs are hexadecimal digits. |
| ERROR | invalid digit ~c in character reference |
| CAUSE | An invalid digit was found in a character reference. |
| ACTION | Character references are either &#DDD; where Ds are decimal digits, or &#xHHH; where Hs are hexadecimal digits. |