In Section 2.32, <name>
So the <name> element can contain text or <tt>, and <tt> can contain
other markup like <sub> and <sup> etc., but why cannot <name> contain
<sup> etc. directly?
Proposal: Change the <name> element schema to permit all inline
elements that <tt> can contain, in addition to <tt>.
Implementation: Not changed in the current version of xml2rfc.
Implementing this would be a simple matter of changing
the v3 schema; no formatter changes would be needed.