| 3.2. The NS RRset
| Both the child and the parent have a copy of the NS RRset. These
| RRsets are supposed to be identical. If they differ, it is referred
| as a "Lame Delegation".
I have always thought that a "Lame Delegation" was something more specific:
an NS record in the delegation that points to a server that is not in fact
authoritative for the zone at all. Is the above actually common usage?
[That's not to say that any differences between the two NS RRsets is ever
desirable, except as may be necessary or expedient during a change.]