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Re: Issue 113, was: Proposed resolution for Issue 13 (language tags)

From: Felix Sasaki <fsasaki@w3.org>
Date: Sat, 02 Aug 2008 16:03:58 +0900
Message-ID: <489406DE.5080804@w3.org>
To: Julian Reschke <julian.reschke@gmx.de>
CC: ietf-http-wg@w3.org

Julian Reschke さんは書きました:
>
> Julian Reschke wrote:
>>
>> Felix Sasaki wrote:
>>> ...
>>> RFC 4647 defines a basic language range in sec. 2.1 which is the 
>>> same as the language range of sec. 14.4 of RFC 2616. Note also the 
>>> information in sec. 2.1 of RFC 4647:
>>> "Note that
>>> the ABNF [RFC4234] in [RFC2616] is incorrect, since it disallows the
>>> use of digits anywhere in the 'language-range' (see [RFC2616errata])."
>>> So you could just refer to basic language ranges of RFC 4647 and be 
>>> fine.
>>> ...
>>
>> Indeed, thanks for pointing this out. I missed the fact that RFC 4647 
>> defines basic ranges. Will make a concrete proposal later on.
>
> Proposed text:

looks fine to me as well. Re case-insensitive, see mail from Frank.

Felix

>
> -- snip --
> 6.4.  Accept-Language
>
>    The Accept-Language request-header field is similar to Accept, but
>    restricts the set of natural languages that are preferred as a
>    response to the request.  Language tags are defined in Section 3.5.
>
>      Accept-Language = "Accept-Language" ":"
>                        1#( language-range [ ";" "q" "=" qvalue ] )
>      language-range  =
>                <language-range, defined in [RFC4647], Section 2.1>
>
>    Each language-range MAY be given an associated quality value which
>    represents an estimate of the user's preference for the languages
>    specified by that range.  The quality value defaults to "q=1".  For
>    example,
>
>        Accept-Language: da, en-gb;q=0.8, en;q=0.7
>
>    would mean: "I prefer Danish, but will accept British English and
>    other types of English."
>
>    For matching, the "Basic Filtering" matching scheme, defined in
>    Section 3.3.1 of [RFC4647], is used:
>
>       A language range matches a particular language tag if, in a case-
>       insensitive comparison, it exactly equals the tag, or if it
>       exactly equals a prefix of the tag such that the first character
>       following the prefix is "-".
>
>    The special range "*", if present in the Accept-Language field,
>    matches every tag not matched by any other range present in the
>    Accept-Language field.
> -- snip --
>
> This
>
> 1) delegates the definition of language-range to RFC4647, Section 2.1, 
> and
>
> 2) delegates the definition of the matching function to RFC4647, 
> Section 3.3.1 ("Basic Filtering").
>
> Note that the proposed text *repeats* the definition (it's just one 
> sentence, so I'm trying to do the reader a favor by not actually 
> having to loop up the text).
>
> I also note that "Basic Filtering" is case-insensitive, which it 
> wasn't in RFC2616. This is intentional (right?)
Received on Saturday, 2 August 2008 07:04:58 GMT

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