BCP 47 Extension T - Transformed Content
RFC 6497
| Document | Type |
RFC - Informational
(February 2012; Errata)
Was draft-davis-t-langtag-ext (individual in app area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized with errata bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6497 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Pete Resnick | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) M. Davis
Request for Comments: 6497 Google
Category: Informational A. Phillips
ISSN: 2070-1721 Lab126
Y. Umaoka
IBM
C. Falk
Infinite Automata
February 2012
BCP 47 Extension T - Transformed Content
Abstract
This document specifies an Extension to BCP 47 that provides subtags
for specifying the source language or script of transformed content,
including content that has been transliterated, transcribed, or
translated, or in some other way influenced by the source. It also
provides for additional information used for identification.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6497.
Davis, et al. Informational [Page 1]
RFC 6497 BCP 47 Extension T February 2012
Copyright Notice
Copyright (c) 2012 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
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................2
1.1. Requirements Language ......................................4
2. BCP 47 Required Information .....................................4
2.1. Overview ...................................................4
2.2. Structure ..................................................6
2.3. Canonicalization ...........................................7
2.4. BCP 47 Registration Form ...................................8
2.5. Field Definitions ..........................................8
2.6. Registration of Field Subtags .............................10
2.7. Registration of Additional Fields .........................11
2.8. Committee Responses to Registration Proposals .............11
2.9. Machine-Readable Data .....................................11
3. Acknowledgements ...............................................14
4. IANA Considerations ............................................14
5. Security Considerations ........................................14
6. References .....................................................14
6.1. Normative References ......................................14
6.2. Informative References ....................................15
1. Introduction
[BCP47] permits the definition and registration of language tag
extensions "that contain a language component and are compatible with
applications that understand language tags". This document defines
an extension for specifying the source of content that has been
transformed, including text that has been transliterated,
transcribed, or translated, or in some other way influenced by the
source. It may be used in queries to request content that has been
transformed. The "singleton" identifier for this extension is 't'.
Davis, et al. Informational [Page 2]
RFC 6497 BCP 47 Extension T February 2012
Language tags, as defined by [BCP47], are useful for identifying the
language of content. There are mechanisms for specifying variant
subtags for special purposes. However, these variants are
insufficient for specifying content that has undergone
transformations, including content that has been transliterated,
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