stackexchange-dnscontrol/documentation/functions/global/DEFAULTS.md

name	parameters	parameter_types
DEFAULTS	modifiers...	modifiers... RecordModifier[]

DEFAULTS allows you to declare a set of default arguments to apply to all subsequent domains. Subsequent calls to D will have these arguments passed as if they were the first modifiers in the argument list.

var COMMON = NewDnsProvider("foo");
// we want to create backup zone files for all domains, but not actually register them.
// also create a default TTL
DEFAULTS( DnsProvider(COMMON,0), DefaultTTL(1000));

D("example.com", REGISTRAR, DnsProvider("R53"), A("@","1.2.3.4")); // this domain will have the defaults set.

// clear defaults
DEFAULTS();
D("example2.com", REGISTRAR, DnsProvider("R53"), A("@","1.2.3.4")); // this domain will not have the previous defaults.