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Re: S-TAB, <S-tab>, and <backtab>

From: Hongyi Zhao
Subject: Re: S-TAB, <S-tab>, and <backtab>
Date: Thu, 16 Sep 2021 08:09:30 +0800

On Thu, Sep 16, 2021 at 12:17 AM Yuri Khan <> wrote:
> On Wed, 15 Sept 2021 at 19:39, Hongyi Zhao <> wrote:
> > But I still don't understand why my observed behavior is inconsistent
> > with Emacswiki's description.
> Because Emacs does not receive key combinations directly from the
> keyboard. It gets them from a platform-specific lower-level input
> subsystem. For example, on X11, XKB translates Shift+Tab to Shift + a
> special ISO_Left_Tab pseudo-keysym (see
> /usr/share/X11/xkb/symbols/pc). Emacs then translates that to a
> <backtab> event.

Thank you for your explanation, and I confirmed your above comment:

$ egrep -i Tab /usr/share/X11/xkb/symbols/pc
    key  <TAB> {    [ Tab,    ISO_Left_Tab    ]    };

Best, HZ

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