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Domain naming convention for Internet user applications (RFC0819)

IP.com Disclosure Number: IPCOM000004295D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 14 page(s) / 34K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

Z. Su: AUTHOR [+2]

Abstract

For many years, the naming convention "@" has served the ARPANET user community for its mail system, and the substring ">host<" has been used for other applications such as file transfer (FTP) and terminal access (Telnet). With the advent of network interconnection, this naming convention needs to be generalized to accommodate internetworking. A decision has recently been reached to replace the simple name field, "", by a composite name field, "" [2]. This note is an attempt to clarify this generalized naming convention, the Internet Naming Convention, and to explore the implications of its adoption for Internet name service and user applications.

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This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group Zaw-Sing Su (SRI)

Request for Comments: 819 Jon Postel (ISI)

August 1982

The Domain Naming Convention for Internet User Applications

1. Introduction

For many years, the naming convention "@" has served the

ARPANET user community for its mail system, and the substring

"" has been used for other applications such as file transfer

(FTP) and terminal access (Telnet). With the advent of network

interconnection, this naming convention needs to be generalized to

accommodate internetworking. A decision has recently been reached to

replace the simple name field, "", by a composite name field,

"" [2]. This note is an attempt to clarify this generalized

naming convention, the Internet Naming Convention, and to explore the

implications of its adoption for Internet name service and user

applications.

The following example illustrates the changes in naming convention:

ARPANET Convention: Fred@ISIF

Internet Convention: Fred@F.ISI.ARPA

The intent is that the Internet names be used to form a

tree-structured administrative dependent, rather than a strictly

topology dependent, hierarchy. The left-to-right string of name

components proceeds from the most specific to the most general, that

is, the root of the tree, the administrative universe, is on the

right.

The name service for realizing the Internet naming convention is

assumed to be application independent. It is not a part of any

particular application, but rather an independent name service serves

different user applications.

2. The Structural Model

The Internet naming convention is based on the domain concept. The

name of a domain consists of a concatenation of one or more

names>. A domain can be considered as a region of jurisdiction for

name assignment and of responsibility for name-to-address

translation. The set of domains forms a hierarchy.

Using a graph theory representation, this hierarchy may be modeled as

a directed graph. A directed graph consists of a set of nodes and a

RFC 819 August 1982;

collection of arcs, where arcs are identified by ordered pairs of

distinct nodes [1]. Each node of the graph represents a domain. An

ordered pair (B, A), an arc from B to A, indicates that B is a

subdomain of domain A, and B is a simple name unique within A. We

will refer to B as a child of A, and A a parent of B. The directed

graph that best descr...