Standardizing on IDNA 2003 in the URL Standard

John Cowan cowan at
Wed Aug 21 23:30:12 CEST 2013

John C Klensin scripsit:

> That would have meant no separate code point for a final sigma in
> Greek;

See my earlier post for why that's not possible.

> no separate code points for final Kaf, Mem, Nun, Pe, or Tsadi in
> Hebrew;

This is even less possible.  In Hebrew, a pe at the end of a word is
always /f/.  But in Yiddish, there is a contrast between /p/ and /f/ in
final position that Hebrew does not have, and in that case a non-final
pe in final position is used for /p/, sometimes but not always with a
dagesh (embedded dot).

In short, Greek and Hebrew positional variants require AI-hard algorithms.

John Cowan  cowan at
If I have seen farther than others, it is because I am surrounded by dwarves.
        --Murray Gell-Mann

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