This I-D requests to add an entry to the IANA 'Algorithm Type Field'
of the 'IPSECKEY Resource Record Parameters' section. It also suggests
to augment the description of existing entries. Putting things
together, the ID suggests this new content:

   Value  Description                Format description    Reference
   0      No key is present                                [RFC4025]
   1      A DSA Public Key           [RFC2536], Sec. 2     [RFC4025]
   2      A RSA Public Key           [RFC3110], Sec. 2     [RFC4025]
   3      An ECDSA Public Key        [RFC6605], Sec. 4     [RFC4025]

   TBD    An EdDSA Public Key        [RFC8080], Sec. 3     [RFC-TBD]

Checking this against the current IANA registry values, I note that
the current entry for value 3 has [RFC8005] as a reference while the
ID suggests [RFC4025]. Looking at Section 9 of RFC 8005, it seems IANA
has this right and the author got it wrong and this should be:

   Value  Description                Format description    Reference
   0      No key is present                                [RFC4025]
   1      A DSA Public Key           [RFC2536], Sec. 2     [RFC4025]
   2      A RSA Public Key           [RFC3110], Sec. 2     [RFC4025]
   3      An ECDSA Public Key        [RFC6605], Sec. 4     [RFC8005]

   TBD    An EdDSA Public Key        [RFC8080], Sec. 3     [RFC-TBD]