Arabic Joining Classes

From: Andreas Prilop (nhtcapri@rrzn-user.uni-hannover.de)
Date: Thu Jun 02 2005 - 10:16:23 CDT

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    In http://www.unicode.org/versions/Unicode4.0.0/ch08.pdf
    I read on p. 15 (= p. 204)

    | In some cases, characters occur only at the end of words
    | in correct spelling; they are called trailing characters.
    | Examples include teh marbuta, alef maksura, and dammatan.
    | When trailing characters are joining (such as teh marbuta),
    | they are classified as right-joining, even when similarly
    | shaped characters are dual-joining.

    In http://www.unicode.org/Public/UNIDATA/ArabicShaping.txt
    however, the trailing characters U+0649
    http://ppewww.ph.gla.ac.uk/~flavell/unicode/unidata06.html#x0649
    and U+06BA
    http://ppewww.ph.gla.ac.uk/~flavell/unicode/unidata06.html#x06BA
    are classified as dual-joining.
    Why? 

    -- 
http://www.unics.uni-hannover.de/nhtcapri/

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