Harald Alvestrand wrote:
> When ISO's finished its processing of ISO 639-2 (the 3-letter codes)
> to full IS, I fully intend to update RFC 1766 with a reference to this
> document, so that 3-letter language tags can be used.
...
When updating RFC 1766 for the ISO 639-2 three-letter codes, you may
wish also to consider the following modifications, relevant to HTML,
HTTP, CSS and the WAI (Web Accessibility Initiative):
1. Define the interpretation of multi-part language tags (eg en-us)
to be hierarchical, as specified in RFC 2070. Note that RFC 2070
is being incorporated in Cougar, the next version of HTML.
2. Provide codes for language-not-known and for no-language. These
requirements were raised at recent meetings of W3C's HTML WG and
CSS WG. They are needed because HTML has adopted the hierarchical
language tagging model of RFC 2070, eg:
<p lang="fr">French text<span lang="de">German text</span>French
text</p>
If the middle portion is in no-language (or in language-not-known),
one needs to be able to say, eg:
<p lang="fr">French text<span lang="$$$">%^&*@#</span>French
text</p>
where $$$ stands for a code meaning no-language (or language-not-
known).
Thanks,
Misha
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