On 27-Aug-2008, at 20:23 , JINMEI Tatuya / 神明達哉 wrote:

> At Tue, 26 Aug 2008 21:18:23 -0400,
> CB wrote:

>> What differentiates a NXRRSET from an NXDOMAIN?

> These are well known terminologies, not specific to this statistics
> implementation.

There's a fairly helpful page at bind9.net that lists all of the
defined RR types, responses, etc. in DNS, with short explanations of
their meaning and references to the defining RFC. The page is at <http://www.bind9.net/dns-parameters
>. This might help you when you come across unfamiliar terminology.