$ORIGIN example.com.
$TTL 3600

@	SOA	dns1 hostmaster 3 10800 3600 1209600 7200
	NS	dns1
dns1	A	192.0.2.1

labs	A	0.0.0.0
labs	DNAME	dname1.example.com.

labs	DNAME	dname2.example.com.

labs	NS	dns1.example.com.
labs	MX	1 dns1.example.com.

www.labs A	0.0.0.0

cname	A	0.0.0.0
cname	CNAME	example.net.
cname	CNAME	example.org.

@	CNAME	example.net.
txt	TXT	loaded