Re: BidiMirrored property and ancient scripts (Was Re: Plain text custom fraction input)

From: Richard Wordingham <>
Date: Sat, 25 Jul 2015 08:44:22 +0100

On Sat, 25 Jul 2015 10:14:58 +0300
Eli Zaretskii <> wrote:

> From: Richard Wordingham <>
> > Asmus Freytag <> wrote:

> > > We do want "BidiMirrorred=No" to be honored; for example for the
> > > arrows and the ornate parens. And we do not want that to be
> > > overridden
> > And at present, that may be overridden in a right-to-left context!

> What do you mean by "overridden" in this context? AFAIK, mirroring
> indeed depends on context, but a character whose BidiMirrorred
> property is No will _never_ be mirrored, according to the UBA. There
> are no overrides for that property, AFAIK.

Reread the Bidi algorithm, especially and

In principle, I could have a higher-level protocol that mirrors lamedh
on Wednesdays, but I must follow the rules for parentheses.

It's part of the tendency to write specifications as 'Do what you want,
but we recommend...'. It eliminates non-compliances without increasing

Received on Sat Jul 25 2015 - 02:45:35 CDT

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