Hi Peter,
At 04:16 AM 07-02-2019, Petr Špacek wrote:
here is a quiz for experienced RFC archeologists:

https://tools.ietf.org/html/rfc1035#section-5.2
section 5.2. Use of master files to define zones
does not mention NS at apex at all, but it does explicitly mention SOA
at apex. Can it be interpreted as if NS at apex is not mandatory?

Funnily enough
https://tools.ietf.org/html/rfc1035#section-5.3
has an example which as NS at apex, but it is not clear from the text above.

Is it mandatory or not? Should I submit erratum for RFC 1035?

RFC 1035 assumes that the reader is familiar with RFC 1034. Section 5.2 of RFC 1035 discusses about validity checks to be performed on the master files used to define zones. I would read Section 4.2 of RFC 1034 to understand the technical considerations, e.g. is a NS needed or not. The examples in RFC 1035 are "primarily pedagogical". I suggest taking into consideration that RFC 1035 is part of STD 13 for errata processing.

Regards,
S. Moonesamy
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