On Fri, 9 Mar 2001, Nick NICHOLAS wrote:
> (1) When a letter with a final variant appears alone --- say as a numeral,
> or in discussion of the letter or phoneme --- does it under any
> circumstances appear in its final form, or is it always medial?
> (2) Do diacritics --- vowel points, cantillations, extra dots on Arabic
> letters, whatever --- ever make a final form medial?
Your question is really obscure. Arabic has clearly known rules for
contextual shaping, which you can find in the Unicode Standard book.
To be short, letter forms only depend on previous and next letters
(or special joining characters).
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