Re: Vertical BIDI

From: fantasai (
Date: Fri May 14 2004 - 14:59:24 CDT

  • Next message: "Re: [BULK] - Re: Interleaved collation of related scripts" wrote:
    > A page that contained both Mongolian and vertical CJK might require
    > a vertical bidirectional algorithm, but AFAIK that question has not
    > yet arisen.

    CJK and Mongolian are both top-to-bottom scripts, so there is no bidi
    issue involved. You only get bidi problems if scripts on a single
    line go in opposite directions. In vertical text, this can happen
    with English and Chinese as well as Chinese and Arabic, and /there/'s
    the problem -- English and Chinese are both LTR scripts. Unicode BIDI
    does need to be extended to handle vertical directionality properly.

    See the first two sections of
    for a brief intro. I'll try to write up something more Unicode-oriented
    this week.

    No, I am not asking for vertical text controls; that's what CSS's
    'block-progression' property is for.



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