1example. 86400 IN SOA ns1 admin 2018031900 ( 2 1800 900 604800 86400 ) 3 86400 IN NS ns1 4 86400 IN NS ns2 5 86400 IN ZONEMD 2018031900 1 1 ( 6 31cefb03814f5062 7 ad12fa951ba0ef5f 8 8da6ae354a415767 9 246f7dc932ceb1e7 10 42a2108f529db6a3 11 3a11c01493de358d ) 12ns1 3600 IN A 203.0.113.63 13ns2 3600 IN AAAA 2001:db8::63 14occluded.sub 7200 IN TXT "I'm occluded but must be digested" 15sub 7200 IN NS ns1 16duplicate 300 IN TXT "I must be digested just once" 17duplicate 300 IN TXT "I must be digested just once" 18foo.test. 555 IN TXT "out-of-zone data must be excluded" 19non-apex 900 IN ZONEMD 2018031900 1 1 ( 20 616c6c6f77656420 21 6275742069676e6f 22 7265642e20616c6c 23 6f77656420627574 24 2069676e6f726564 25 2e20616c6c6f7765 ) 26