In addition to this ticket, here some documentation about XML comments :
- Guidelines for the Use of Extensible Markup Language (XML) within IETF Protocols : https://datatracker.ietf.org/doc/html/rfc3470#section-4.6
- Extensible Markup Language (XML) 1.0 (Fifth Edition) W3C Recommendation https://www.w3.org/TR/REC-xml/#sec-comments