[DNSOP] Question on RRtypes in RFC 4034 Section 6.2

[Paul Wouters <[e-mail]>]

Hi,

Section 6.2 of 4034 talks about canonicalization of the RR Form

Item 3 states:

3.  if the type of the RR is NS, MD, MF, CNAME, SOA, MB, MG, MR, PTR,
        HINFO, MINFO, MX, HINFO, RP, AFSDB, RT, SIG, PX, NXT, NAPTR, KX,
        SRV, DNAME, A6, RRSIG, or NSEC, all uppercase US-ASCII letters in
        the DNS names contained within the RDATA are replaced by the
        corresponding lowercase US-ASCII letters;

My questions:

a) What was the purpose of listening these and not all RRtypes?
    (It seems perhaps it wanted to say "All except A/AAAA")
b) What should be done with new RRtypes like OPENPGPKEY or SMIMA?
c) Why the hell - hardcoded lists and not IANA registry?
d) Does this need updating or an errata?

Paul