; $Id: rfc1035-2.3.abnf 24 2007-10-13 20:36:23Z gotthardp $ ; ; P. Mockapetris ; "DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION", ; RFC 1035, ; November 1987. ; ; 2.3.1. Preferred name syntax ; !syntax("abnf-rfc1035") ; !import("ALPHA" as "", "DIGIT" as "", "rfc2234-6.1.abnf") ::= | " " ::=