Re: [Ltru] Re: RFC 4646 production "grandfathered" considered harmful

Frank Ellermann scripsit:

> Splitting i-anything from the rest is fine, IMO unnecessary to
> enumerate them in the ABNF:  Any decent parser could handle
> x-anything, it should be also able to handle i-anything.  

There's no reason to allow i-bogon to be well-formed.

> Cheating, zh-min-nan isn't really irregular, but together with
> en-GB-oed and <sgn-legacy> it's the list of grandfathered tags
> with three parts. 

Just so.  The ABNF is syntactic, so I listed only the elements
that do not match the "langtag" production.

-- 
John Cowan    cowan@ccil.org    http://ccil.org/~cowan
The present impossibility of giving a scientific explanation is no proof
that there is no scientific explanation. The unexplained is not to be
identified with the unexplainable, and the strange and extraordinary
nature of a fact is not a justification for attributing it to powers
above nature.  --The Catholic Encyclopedia, s.v. "telepathy" (1913)

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