Doug Ewell wrote:
The Unicode bidirectional algorithm INTENTIONALLY does not solve any
problems related to vertically rendered scripts. The architects of the
bidi algorithm have told us repeatedly that they consider vertical
rendering issues to be out of scope. That is the way it is.
The Unicode bidirectional algorithm ALREADY solves problems related to
vertically-rendered scripts. It's just missing the DATA. As for TR 9,
it would indeed need some revision to discuss how the algorithm would
be used in vertical text, but afaict the algorithm itself can already
handle the relevant bidi issues.
~fantasai
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