Compatibility decomposition for Hebrew and Greek final letters

[Eli Zaretskii]

> Date: Thu, 19 Feb 2015 11:47:24 GMT
> From: Julian Bradfield <jcb+unicode at inf.ed.ac.uk>
> 
> In Arabic, the variant of a letter is determined entirely by its
> position, so there is no compelling need to represent the forms separately
> (as characters rather than glyphs) save for the existence of legacy
> standards (and if there is, you can use the ZWJ/ZWNJ hacks). Thus the
> forms would not have been encoded but for the legacy standards.
> Whereas in Hebrew, non-final forms appear finally in certain contexts
> in normal text; and in Greek, while Greek text may have a determinate
> choice between σ and ς, there are many contexts where the two symbols
> are distinguished (not least maths).

Got it, thanks.