$ORIGIN com.
$TTL 604800
@ IN SOA x.gtld-servers.net. root.com. (
  0000000000    ; serial
          1D    ; refresh
          1H    ; retry
          1W    ; expire
     2000000 )  ; minimum

                    IN NS   x.gtld-servers.net.
                    IN NS   y.gtld-servers.net.
                    IN NS   z.gtld-servers.net.
x.gtld-servers.net. IN A    172.18.1.12
y.gtld-servers.net. IN A    172.18.1.13
z.gtld-servers.net. IN A    172.18.1.14
x.gtld-servers.net. IN AAAA fd00::c
y.gtld-servers.net. IN AAAA fd00::d
z.gtld-servers.net. IN AAAA fd00::e

test                IN NS   ns1.test.com.
test                IN NS   ns2.test.com.
ns1.test.com.       IN A    172.18.1.22
ns2.test.com.       IN A    172.18.1.23

$INCLUDE /var/named/keys/com.keys
$INCLUDE /var/named/keys/dsset-test.com.