--- In rss-public@yahoogroups.com, "Addison Phillips" <addison@...> wrote:
> In browsing the Best Practices profile [1], I note that the
> definition of language in RSS is a bit stale. In particular, the
> profile implies that only ISO 639 codes are valid and the link to
> RSS 0.91 codes is slightly stale also.

The profile's definition is based on the RSS 2.0 spec's guidance for
allowable language codes, which is this: "A list of allowable values
for this element, as provided by Netscape, is here [1]. You may also
use values defined [2] by the W3C."

1: http://www.rssboard.org/rss-language-codes
2: http://www.w3.org/TR/REC-html40/struct/dirlang.html#langcodes

> In fact, the language tags defined by W3C are the same as IETF BCP 47
> (currently represented by RFC 4646) and the codes, including the ISO
> 639 codes, are all included in an IANA maintained subtag registry. I
> would like to suggest updating the Best Practices profile and other
> documentation to reflect these changes.

Where would you like the spec and profile to link? I'd like to see us
offer the best advice here, and we're in a good position to help
because we get a lot of traffic for people searching for "RSS language
codes":

http://www.google.com/search?q=rss+language+codes