$ORIGIN yerp.org.

$INCLUDE /home/jm/zones/zone.example.org.d/soa_line

zone.example.org.       IN NS   ns6.gandi.net.

ns6.gandi.net.  IN A    217.70.177.40

$ORIGIN foo.rules.zone.example.org.
$INCLUDE /home/jm/zones/foo.rules.zone.example.org.d/3.2.x
$INCLUDE /home/jm/zones/foo.rules.zone.example.org.d/3.3.0
mirrors         TXT     "http://zone.example.org/rules/foo/MIRRORED.BY" 

