Compatibility decomposition for Hebrew and Greek final letters

Michael Everson everson at
Thu Feb 19 05:21:19 CST 2015

On 19 Feb 2015, at 10:55, Eli Zaretskii <eliz at> wrote:

> Does anyone know why does the UCD define compatibility decompositions
> for Arabic initial, medial, and final forms, but doesn't do the same
> for Hebrew final letters, like U+05DD HEBREW LETTER FINAL MEM?  Or for
> that matter, for U+03C2 GREEK SMALL LETTER FINAL SIGMA?
> The relevant application where this would matter is text search, where
> these letters might be folded to the same code point for the purposes
> of comparison.

Such comparisons happen at a different level, I think. 

Michael Everson *

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