Re: New FAQ page

From: James Kass (
Date: Sun Oct 14 2007 - 00:18:24 CDT

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    Our favorite new FAQ page implies that certain characters should
    never display in text.

    Suppose your cat jumps on your keyboard and starts playing with
    your mouse while you are off in the kitchen getting your morning
    tea, and the cat inserts sixteen CGJ characters in-a-row into your

    A font developer (especially one who has cats) might anticipate this
    and make a GSUB look-up to handle two CGJ characters in succession.
       CGJ + CGJ ======> (a really bizarre, stand-out control picture)

    Developers do things like this as a service to their users.

    But, if the operating system won't implement that substitution
    look-up because the rendering engineer has followed the FAQ page,
    the user will never see the alert, and the design decisions of
    the font's developer are thwarted.

    *That* can't be good.

    Best regards,

    James Kass

    P.S. - "But, James, 16 CGJs in a row isn't *normal* text!"
            response: "Neither are invalid variation sequences."

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