Ietf Idn Working Group

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." 1. Abstract For restrict use of Domain Name System (DNS) for domain names with alphanumeric characters only, there needs a way to find an Internet host using multilingual domain names: Internationalized Domain Name System (IDNS). This document describes how multilingual domain names are handled in a new protocol scheme for IDNS servers and resolvers in architectural view and it updates the [RFC1035] but still preserves the backward compatibility with the current DNS protocol. 2. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. "IDNS" (Internationalized Domain Name System) is used here to indicate a new system designed for a domain name service, which supports multilingual domain names. "The current/conventional DNS" or "DNS" (Domain Name System) is used here to indicate the domain name systems currently in use. It fulfills the [RFC1034, RFC1035], but implementations and functional operations may be different from each other. The "alphanumeric" character data used here is the character set that is allowed for a domain name in DNS query format, [a-zA-Z0-9-].