not a flame, please explain??

[Jerry Kemp - bind]

I am usually a lurker on this list picking up all kinds of good
information, but I have a question about bind version numbers.

It is my understanding that after bind 8.1.2 came 8.2 then 8.2.1
and to this day 8.2.2.  I also understand that there are various
patches for certain versions.

With all of the above out of the way, I see references to various
oddball version numbers of bind, the most common being 8.1.5 which
is usually from a linux user.

Can someone explain the unique version numbers to me??

Thanks,

Jerry