Personally I leaned towards ISC-style format for, e.g., BIND9: * https://bind9.readthedocs.io/en/latest/reference.html https://bind9.readthedocs.io/en/latest/r

Personally I leaned towards ISC-style format for, e.g., BIND9: * https://bind9.readthedocs.io/en/latest/reference.html https://bind9.readthedocs.io/en/latest/reference.html additional-from-auth (yes | no) ; allow-query-on { address_match_list }; also-notify { ip_addr [port ip_port] ; ... ] }; category category_name { channel_name; ... }; channel channel_name { channel_spec }; * https://www.zytrax.net/books/dns/ch7/statements.html https://www.zytrax.net/books/dns/ch7/statements.html Kind of BNF-y.