T_DS
| T_DS sp rdata_ds
| T_DS sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
%token <type> T_AXFR T_MAILB T_MAILA T_DS T_DLV T_SSHFP T_RRSIG T_NSEC T_DNSKEY
{ T_DS, "DS" }, /* RFC 4034 */