[CentOS] Bind Standard Practise

In a chroot Bind installation, named.conf is located in /var/named/chroot/etc/.
In that file, references to files for includes and other zones can be made as "filename"
without a path. What is the expected location when no path is used, simply up one dir
under chroot/? While moving a DNS from one machine to another, I noticed all ref's are
"/etc/filename" and they are in the same dir as named.conf which obviously looks different
from all the sample files.

Thanks!
jlc