Re: [Ltru] 4.4.1: limited buffer sizes

["Phillips, Addison" <addison at amazon.com>]

Another artifact. The original requirement was:

- MUST allow 33
- SHOULD allow 42

The smaller limit was because extlangs weren't actually permitted... however... a close examination of the text in 4646 reveals that 34 is ALSO not the number. That's because a registered primary language subtag is now longer than a language-extlang sequence. Hence:

<t>Protocols or specifications that specify limited buffer sizes for language tags MUST allow for language tags of at least
35 characters. Note that <xref target="RFC4646">RFC 4646</xref> recommended a field size of 42 characters because it included all three elements of the 'extlang' production. Two of these are now permanently reserved, so a registered primary language subtag of the maximum length of eight characters is now longer than the longest language-extlang combintation. Protocols or specifications that commonly use extensions or private use subtags might wish to reserve or recommend a longer "minimum buffer" size.</t>

And the art:

language      =  8 (longest registered value)
script        =  5 (if not suppressed: see Section 4.1)
region        =  4 (UN M.49; ISO 3166-1 requires 3)
variant1      =  9 (needs 'language' as a prefix)
variant2      =  9 (needs 'language-variant1' as a prefix)

total         = 35 characters

Addison Phillips
Globalization Architect -- Lab126

Internationalization is not a feature.
It is an architecture.


> -----Original Message-----
> From: Peter Constable [mailto:petercon at microsoft.com]
> Sent: Tuesday, July 08, 2008 9:54 PM
> To: Phillips, Addison; LTRU Working Group
> Subject: RE: 4.4.1: limited buffer sizes
>
> > From: Phillips, Addison [mailto:addison at amazon.com]
>
>
> > Well they're both wrong. The actual number is 34.
>
> I suspected such a number.
>
>
> > The text has been modified to read:
>
> ...
> > <t>Protocols or specifications that specify limited buffer sizes
> for
> > language tags MUST allow for language tags of up to 34
> characters.</t>
> >
> > <t>Protocols or specifications that specify limited buffer sizes
> for
> > language tags SHOULD allow for language tags of at least
> > 34 characters.
>
> The latter statement seems pointless in light of the former: the
> former makes the latter mandatory. (That was part of my concern
> earlier; I should have stated that explicitly.)
>
>
>
> Peter
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