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Re: [Ltru] Uniqueness of variant subtags



<mark at macchiato dot com> wrote:

Thanks for the comments. After thinking about it a bit, I made some significant edits, as follows.

I can live with this. I'm still concerned that we are not only opening the door to the type of year-abuse I've complained about, but stationing a barker outside the door to push people in. But by no means is it a syntactic or common-sense showstopper, as the idea of "two different '1901' subtags" was.

--
Doug Ewell  *  Thornton, Colorado, USA  *  RFC 4645  *  UTN #14
http://www.ewellic.org
http://www1.ietf.org/html.charters/ltru-charter.html
http://www.alvestrand.no/mailman/listinfo/ietf-languages  ˆ


<t>Records are unique by Type and Subtag: the registry MUST not
contain two different records that have identical values for both Type
and Subtag. Thus requests to assign an additional record of a given
Type with an existing Subtag value MUST be rejected. For example, the
variant subtag 'rozaj' already exists in the registry, so adding a
second record of type 'variant' with the subtag 'rozaj' is prohibited.
However, information <i>can</i> be added to an existing record. For
example, the '1994' subtag variant record could have the prefix
'fr-CA' added together with a description of usage for a French
Canadian spelling reform associated with the year 1994.</t>

<t>Variant subtags that are used with multiple prefixes must have
consistent semantics across those prefixes. Variant subtags MAY
indicate an organization (including governments), such as 'ungegn',
'usbgn', or 'cisgost'. When applied to different prefixes, each would
consistently refer to a variant as specified by that organization for
those prefixes. For example, 'ungegn' could be defined as referring to
a transliteration for any given prefix as specified by the United
Nations Group of Experts on Geographical Names (UNGEGN).</t>

<t>Four digit subtags are reserved for indicating a year. Their
meaning is in reference to some significant specification or other
work associated with that year. It may have multiple prefixes: the
particular specification for a given prefix MUST be clearly indicated
in one of the Descriptions.</t>

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