RFC 2915 (rfc2915) - Page 1 of 18
The Naming Authority Pointer (NAPTR) DNS Resource Record
Alternative Format: Original Text Document
Network Working Group M. Mealling
Request for Comments: 2915 Network Solutions, Inc.
Updates: 2168 R. Daniel
Category: Standards Track DATAFUSION, Inc.
September 2000
The Naming Authority Pointer (NAPTR) DNS Resource Record
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
This document describes a Domain Name System (DNS) resource record
which specifies a regular expression based rewrite rule that, when
applied to an existing string, will produce a new domain label or
Uniform Resource Identifier (URI). Depending on the value of the
flags field of the resource record, the resulting domain label or URI
may be used in subsequent queries for the Naming Authority Pointer
(NAPTR) resource records (to delegate the name lookup) or as the
output of the entire process for which this system is used (a
resolution server for URI resolution, a service URI for ENUM style
e.164 number to URI mapping, etc).
This allows the DNS to be used to lookup services for a wide variety
of resource names (including URIs) which are not in domain name
syntax. Reasons for doing this range from URN Resource Discovery
Systems to moving out-of-date services to new domains.
This document updates the portions of RFC 2168 specifically dealing
with the definition of the NAPTR records and how other, non-URI
specific applications, might use NAPTR.
Mealling & Daniel Standards Track