chroot/etc/named/ directory?

[Robert Moskowitz]

I am upgrading my server from bind-9.3.6 via Centos 5.5 to 9.8.2 in 
Centos 6.3.

I have and will run bind chrooted and on my test setup I noticed a 'new' 
subdirectory in the chroot tree:

/var/named/chroot/etc/named/

I cannot find any documentation as what is indended to be placed in this 
subdirectory.  my includes for named.conf?

I am assuming the pki subdirectory is for DNSSEC related files, but I 
have not found any documentation indicating so.  But then I have not 
plowed through DNSSEC documention in depth yet.