RFC 7991, "The "xml2rfc" Version 3 Vocabulary", December 2016Source of RFC: IAB
Errata ID: 5618
Publication Format(s) : TEXT
Reported By: Kent Watsen
Date Reported: 2019-01-31
Section 2.5.6 says:
It is an error to have both a "src" attribute and content in the <artwork> element.
This sentence needs to be removed because the second paragraph in Section 2.5 says that the "textual content acts as a fallback" for the "src" attribute.