; For ns{2,3}.child.zone11.xa

$ORIGIN spf-missing-on-one.zone11.xa.
$TTL 3600

$INCLUDE COMMON-SCENARIO-INCLUDE-THREE-NS

@               IN  TXT  "v=spf1 ip4:192.0.2.50 ip6:2001:db8:0:8::50 -all"