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RFC 6067, "BCP 47 Extension U", December 2010


Errata ID: 4363
Status: Rejected
Type: Technical
Publication Format(s) : TEXT

Reported By: Mark Ziegast
Date Reported: 2015-05-11
Rejected by: Barry Leiba
Date Rejected: 2015-05-12

Section All says:

This registration is invalid because it attempts to
impose restrictions on field ordering the governing
BCP47 has as illegal for extension subtag
canonicalization. The subtags are limited to 8
characters, and any subfields of a subtag must use a
DIGIT or ALPHA that is not a valid subfield character
as separator, not DASH as specified, to maintain a
particular subfield order.

It should say:

Not correctable, must be reformulated and a new RFC submitted.


BCP 47 requires that extensions have a canonical form. There is no restriction on subtag ordering in an extension imposed by BCP 47, but an extension can specify such an order (in this case it does). Subtags in this RFC are separated by DASH and the dash is not part of any subtag. Unlike the base language tag, there is interplay between subtags, but this is not the same thing as the submitter implies. There exist important implementations that depend on this.

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