Language attributes- what are they?

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John Cowan wrote:
> Yes: in short, we agree: sort order is not suitable for language-tagging
> except in the exceptional case where you want to mark that a static document is
> *already* sorted according to some order.

Yes, I agree with this, although I don't think it is that exceptional and
rather common for there to be sorted lists in content. (References and such.)

I was trying to bear down on the point that the language tag does specify the
sort order used within the document.

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