A MIB Textual Convention for Language Tags
draft-mcwalter-langtag-mib-03
The information below is for an old version of the document that is already published as an RFC.
| Document | Type |
This is an older version of an Internet-Draft that was ultimately published as RFC 5131.
|
|
|---|---|---|---|
| Author | David McWalter | ||
| Last updated | 2015-10-14 (Latest revision 2007-03-22) | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | Proposed Standard | ||
| Formats | |||
| Stream | WG state | (None) | |
| Document shepherd | (None) | ||
| IESG | IESG state | Became RFC 5131 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | Bill Fenner (ˢˣˠ) | ||
| Send notices to | (None) |
draft-mcwalter-langtag-mib-03
IETF D. McWalter, Ed.
Internet-Draft Data Connection Ltd
Proposed Status: Standards Track March 20, 2007
Expires: September 21, 2007
A MIB Textual Convention for Language Tags
draft-mcwalter-langtag-mib-03.txt
Status of this Memo
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Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This MIB module defines a textual convention to represent BCP 47
language tags. The intent is that this textual convention will be
imported and used in MIB modules that would otherwise define their
own representation.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. The Internet-Standard Management Framework . . . . . . . . . . 3
4. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. Notes to the RFC editor - remove before publication . . . . . 5
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6
9.1 Normative References . . . . . . . . . . . . . . . . . . . 6
9.2 Informative References . . . . . . . . . . . . . . . . . . 6
Author's Address . . . . . . . . . . . . . . . . . . . . . . . 6
Intellectual Property and Copyright Statements . . . . . . . . 7
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1. Introduction
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
It defines a textual convention to represent BCP 47 [RFC4646]
language tags.
The LangTag textual convention defined by this RFC replaces the
similar LanguageTag textual convention defined by RFC 2932 [RFC2932].
The old LanguageTag textual convention is used by some existing MIB
modules. New MIB modules should use the LangTag textual convention,
which has been created (and is to be preferred) for the following
reasons:
o Its syntax description is current, and is more comprehensive.
o It is short enough to use as an index object without subtyping,
yet is of adequate length to represent any language tag in
practice.
o It is provided in a dedicated MIB module to simplify module
dependencies.
It is not possible to apply changes in syntax and length to an
existing textual convention. This is why the creation of a new
textual convention with a new name was necessary.
2. Terminology
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 RFC 2119 [RFC2119].
3. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
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4. Definitions
LANGTAG-TC-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, mib-2 FROM SNMPv2-SMI -- [RFC2578]
TEXTUAL-CONVENTION FROM SNMPv2-TC; -- [RFC2579]
langTagTcMIB MODULE-IDENTITY
LAST-UPDATED "200703200000Z" -- 20 March 2007
ORGANIZATION "IETF Operations and Management (OPS) Area"
CONTACT-INFO "EMail: ops-area@ietf.org
Home page: http://www.ops.ietf.org/"
DESCRIPTION
"This MIB module defines a textual convention for
representing BCP 47 language tags."
REVISION "200703200000Z" -- 20 March 2007
DESCRIPTION
"Initial revision, published as RFC yyyy.
Copyright (C) The IETF Trust (2007). This version of this
MIB module is part of RFC yyyy; see the RFC itself for full
legal notices."
-- RFC Ed.: replace yyyy with actual RFC number & remove this note
::= { mib-2 XXX }
-- RFC Ed.: replace XXX with IANA-assigned number & remove this note
LangTag ::= TEXTUAL-CONVENTION
DISPLAY-HINT "1a"
STATUS current
DESCRIPTION
"A language tag, constructed in accordance with BCP 47.
Only lowercase characters are allowed. The purpose of this
restriction is to provide unique language tags for use as
indexes. BCP 47 recommends case conventions for user
interfaces, but objects using this textual convention MUST
use only lowercase.
Values MUST be well-formed language tags, in conformance
with the definition of well-formed tags in BCP 47. An
implementation MAY further limit the values it accepts to
those permitted by a 'validating' processor, as defined in
BCP 47.
In theory, BCP 47 language tags are of unlimited length.
The language tag described in this TC is of limited length.
The analysis of language tag lengths in BCP 47 confirms that
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this limit will not pose a problem in practice. In
particular, this length is greater than the minimum
requirements set out in section 4.3.1.
A zero-length language tag is not a valid language tag.
This can be used to express 'language tag absent' where
required, for example when used as an index field."
REFERENCE "RFC 4646 BCP 47"
SYNTAX OCTET STRING (SIZE (0 | 2..63))
END
5. Security Considerations
This MIB module does not define any management objects. Instead, it
defines a textual convention that may be imported by other MIB
modules and used for object definitions.
Meaningful security considerations can only be written in the MIB
modules that define management objects. This document therefore has
no impact on the security of the Internet.
6. IANA Considerations
LANGTAG-TC-MIB should be rooted under the mib-2 subtree. IANA is
requested to assign { mib-2 XXX } to the LANGTAG-TC-MIB module
specified in this document.
7. Notes to the RFC editor - remove before publication
This document should be published simultaneously with IPMCAST-MIB
(draft-ietf-mboned-ip-mcast-mib).
This is because LANGTAG-MIB replaces the LanguageTag textual
convention that is already present in RFC 2932, which will be
obsoleted by the publication of IPMCAST-MIB.
8. Acknowledgements
This MIB module is a reworking of existing material from RFC 2932.
This module was generated by editing together contributions from
Randy Presuhn, Dan Romascanu, Bill Fenner, Juergen Schoenwaelder,
Bert Wijnen, Doug Ewell, and Ira McDonald.
9. References
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9.1 Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Textual Conventions for SMIv2",
STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
[RFC4646] Phillips, A. and M. Davis, "Tags for Identifying
Languages", BCP 47, RFC 4646, September 2006.
9.2 Informative References
[RFC2932] McCloghrie, K., Farinacci, D., and D. Thaler, "IPv4
Multicast Routing MIB", RFC 2932, October 2000.
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002.
Author's Address
David McWalter (editor)
Data Connection Ltd
100 Church Street
Enfield EN2 6BQ
United Kingdom
Email: dmcw@dataconnection.com
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Acknowledgment
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Internet Society.
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