what constitutes a update version change

[Blackburn, Marvin]

I ran into a problem where I needed to be at RHEL 3.0 update 5.
I also wanted to update my system as much as possible without
transitioning to update 6.

I erronously thought that update versioning was tied to kernel changes;
however, I found that
after running up2date on update5 (not loading the newer kernel), the
version changed to update 6.

Other than the obvious update to the /etc/redhat-version file, what
dictates the version change?

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Marvin Blackburn
Systems Administrator
Glen Raven
"He's no failure.  He's not dead yet" --William Lloyd George