Update to the Language Subtag Registry
RFC 5645
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RFC - Informational
(September 2009; No errata)
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Last updated |
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2015-10-14
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IETF
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plain text
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| IESG |
IESG state |
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RFC 5645 (Informational)
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Consensus Boilerplate |
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Unknown
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Responsible AD |
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Alexey Melnikov
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Send notices to |
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(None)
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Network Working Group D. Ewell, Ed.
Request for Comments: 5645 Consultant
Category: Informational September 2009
Update to the Language Subtag Registry
Abstract
This memo defines the procedure used to update the IANA Language
Subtag Registry, in conjunction with the publication of RFC 5646, for
use in forming tags for identifying languages.
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Updating the Registry . . . . . . . . . . . . . . . . . . . . 2
2.1. Starting Point . . . . . . . . . . . . . . . . . . . . . . 2
2.2. New Language Subtags . . . . . . . . . . . . . . . . . . . 4
2.3. Modified Language Subtags . . . . . . . . . . . . . . . . 5
2.4. New Region Subtags . . . . . . . . . . . . . . . . . . . . 6
2.5. Grandfathered and Redundant Tags . . . . . . . . . . . . . 6
2.6. Preferred-Value Changes . . . . . . . . . . . . . . . . . 9
2.7. Additional Changes . . . . . . . . . . . . . . . . . . . . 9
3. Updated Registry Contents . . . . . . . . . . . . . . . . . . 10
4. Security Considerations . . . . . . . . . . . . . . . . . . . 10
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1. Normative References . . . . . . . . . . . . . . . . . . . 11
6.2. Informative References . . . . . . . . . . . . . . . . . . 12
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 13
Ewell Informational [Page 1]
RFC 5645 Update to the Language Subtag Registry September 2009
1. Introduction
[RFC4646] provides for a Language Subtag Registry and describes its
format. The initial contents of the registry and rules for
determining them are specified in [RFC4645].
[RFC5646] expands on [RFC4646] by adding support for approximately
7,500 new primary and extended language subtags based on [ISO639-3]
and [ISO639-5] alpha-3 code elements, and seven new region subtags
based on [ISO3166-1] exceptionally reserved code elements. This memo
describes the process of updating the registry to include these
additional subtags and to make secondary changes to the registry that
result from adding the new subtags and from other decisions made by
the Language Tag Registry Update (LTRU) Working Group.
In writing this document, a complete replacement of the contents of
the Language Subtag Registry was provided to the Internet Assigned
Numbers Authority (IANA) to record the necessary updates.
The format of the Language Subtag Registry as well as the definition
and intended purpose of each of the fields are described in
[RFC5646].
The registry is expected to change over time, as new subtags are
registered and existing subtags are modified or deprecated. The
process of updating the registry is described in Section 3 of
[RFC5646].
Many of the subtags defined in the Language Subtag Registry are based
on code elements defined in [ISO639-1], [ISO639-2], [ISO639-3],
[ISO639-5], [ISO3166-1], [ISO15924], and [UN_M.49]. The registry is
not a mirror of the code lists defined by these standards and should
not be used as one.
2. Updating the Registry
This section describes the process for determining the updated
contents of the Language Subtag Registry.
2.1. Starting Point
The version of the Language Subtag Registry that was current at the
time of IESG approval of this memo served as the starting point for
this update. This version was created according to the process
described in [RFC4645] and maintained according to the process
described in [RFC4646].
Ewell Informational [Page 2]
RFC 5645 Update to the Language Subtag Registry September 2009
The source data for [ISO639-3] used for this update consisted of
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