RFC 4034, "Resource Records for the DNS Security Extensions", March 2005

Note: This RFC has been updated by RFC 4470, RFC 6014, RFC 6840, RFC 6944, RFC 9077

Errata ID: 1062
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Peter Koch
Date Reported: 2005-09-13
Verifier Name: Brian Haberman
Date Verified: 2012-05-01

Section 6.2 says:

   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;

It should say:

[not supplied]

Notes:

Compare with RFC 3597 (section 7):

"As a courtesy to implementors, it is hereby noted that the complete
set of such previously published RR types that contain embedded
domain names, and whose DNSSEC canonical form therefore involves
downcasing according to the DNS rules for character comparisons,
consists of the RR types NS, MD, MF, CNAME, SOA, MB, MG, MR, PTR,
HINFO, MINFO, MX, HINFO, RP, AFSDB, RT, SIG, PX, NXT, NAPTR, KX, SRV,
DNAME, and A6."

Almost exactly the same list. One HINFO too much is no issue,
but if this actually should be TXT it's a real typo.

neither TXT nor HINFO contain domain names in RDATA, so it's a bug in both
RFC 3597 and 4034, although one that doesn't hurt. One could also argue that the list lacks NSAP-PTR, but then that's as obsolete as MD ans MF.

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