RE: Sort Order

From: Kent Karlsson (
Date: Fri Dec 05 2003 - 06:22:43 EST

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    Philippe Verdy wrote:

    > It will be however simpler than sorting Thai with the
    > logical (phonetic) order, which requires a preprocessing
    > to find grapheme clusters and syllables with a dictionnary,

    I've been told that that is not desirable, even though older
    dictionaries may have used such an ordering (maintained
    "by hand"). One reason it is not desirable may be that there
    are ambiguities. (Apart from ambiguities, this can be done
    without any prehandling, just inside the collation tailoring.)

    > unless you prefer to sort simply on the visual order

    I've been told that this is the desirable way to handle
    Thai ordering, except (of course) that "prevowels" are
    considered as being after the following consonant.
    (Logically/phonetically, it may belong later on, after a
    double, or rather "pair", consonant for instance.)

    UCA uses a prehandling to "swap" the prevowels and
    consonant, a 14651 tailoring for Thai and Lao can do the
    swapping in the collation tailoring itself (as is done in Linux
    locales for Thai and Lao already), to avoid the prehandling.

    (I'm working on an update [shorter(!), using ".."-notation] to
    that paper as well. The preferred Lao ordering may be somewhat
    different, but I need confirmation(s!).)

                    /kent k

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