draft-ietf-ltru-registry-11.txt   draft-ietf-ltru-registry-12.txt 
Network Working Group A. Phillips, Ed. Network Working Group A. Phillips, Ed.
Internet-Draft Quest Software Internet-Draft Quest Software
Expires: February 16, 2006 M. Davis, Ed. Expires: February 18, 2006 M. Davis, Ed.
IBM IBM
August 15, 2005 August 17, 2005
Tags for Identifying Languages Tags for Identifying Languages
draft-ietf-ltru-registry-11 draft-ietf-ltru-registry-12
Status of this Memo Status of this Memo
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on February 16, 2006. This Internet-Draft will expire on February 18, 2006.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2005). Copyright (C) The Internet Society (2005).
Abstract Abstract
This document describes the structure, content, construction, and This document describes the structure, content, construction, and
semantics of language tags for use in cases where it is desirable to semantics of language tags for use in cases where it is desirable to
indicate the language used in an information object. It also indicate the language used in an information object. It also
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the event that they register a previously used value for a new the event that they register a previously used value for a new
purpose. purpose.
o Allows ISO 15924 script code subtags and allows them to be used o Allows ISO 15924 script code subtags and allows them to be used
generatively. Defines a method for indicating in the registry generatively. Defines a method for indicating in the registry
when script subtags are necessary for a given language tag. when script subtags are necessary for a given language tag.
o Adds the concept of a variant subtag and allows variants to be o Adds the concept of a variant subtag and allows variants to be
used generatively. used generatively.
o Adds the ability to use a class of UN M.49 tags for supra- o Adds the ability to use a class of UN M.49 tags for supra-national
national regions and to resolve conflicts in the assignment of ISO regions and to resolve conflicts in the assignment of ISO 3166
3166 codes. codes.
o Defines the private use tags in ISO 639, ISO 15924, and ISO 3166 o Defines the private use tags in ISO 639, ISO 15924, and ISO 3166
as the mechanism for creating private use language, script, and as the mechanism for creating private use language, script, and
region subtags respectively. region subtags respectively.
o Adds a well-defined extension mechanism. o Adds a well-defined extension mechanism.
o Defines an extended language subtag, possibly for use with certain o Defines an extended language subtag, possibly for use with certain
anticipated features of ISO 639-3. anticipated features of ISO 639-3.
Ed Note: The following items are provided for the convenience of
reviewers and will be removed from the final document.
Changes between draft-ietf-ltru-registry-10 and this version are:
o Changed the text describing extensions from "single-letter" to
"single character" or "singleton" to be consistent with the ABNF
and the WG's intentions (D.Ewell)
o Made RFC 2047, RFC 2781, and RFC 3552 into informative references
(#1095)(K.Karlsson)
o Made modifications to clarify the difference between the Language
Subtag Registry and the Language Extensions Registry (K.Karlsson)
o Inserted some text to ensure that the Language Extensions Registry
is initialized properly (#1103) (K.Karlsson)
9. References 9. References
9.1 Normative References 9.1 Normative References
[ISO10646] [ISO10646]
International Organization for Standardization, "ISO/IEC International Organization for Standardization, "ISO/IEC
10646:2003. Information technology -- Universal Multiple- 10646:2003. Information technology -- Universal Multiple-
Octet Coded Character Set (UCS)", 2003. Octet Coded Character Set (UCS)", 2003.
[ISO15924] [ISO15924]
International Organization for Standardization, "ISO International Organization for Standardization, "ISO
15924:2004. Information and documentation -- Codes for the 15924:2004. Information and documentation -- Codes for the
representation of names of scripts", January 2004. representation of names of scripts", January 2004.
[ISO3166-1] [ISO3166-1]
International Organization for Standardization, "ISO 3166- International Organization for Standardization, "ISO 3166-
1:1997. Codes for the representation of names of 1:1997. Codes for the representation of names of countries
countries and their subdivisions -- Part 1: Country and their subdivisions -- Part 1: Country codes", 1997.
codes", 1997.
[ISO639-1] [ISO639-1]
International Organization for Standardization, "ISO 639- International Organization for Standardization, "ISO 639-
1:2002. Codes for the representation of names of languages 1:2002. Codes for the representation of names of languages
-- Part 1: Alpha-2 code", 2002. -- Part 1: Alpha-2 code", 2002.
[ISO639-2] [ISO639-2]
International Organization for Standardization, "ISO 639- International Organization for Standardization, "ISO 639-
2:1998. Codes for the representation of names of languages 2:1998. Codes for the representation of names of languages
-- Part 2: Alpha-3 code, first edition", 1998. -- Part 2: Alpha-3 code, first edition", 1998.
 End of changes. 

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