At 14:49 +0100 2004-03-24, Chris Jacobs wrote:
> It seems strangely inconsistent to me that Unicode has detailed controls
for horizontal layout direction and the complex bidi algorithm, but has
nothing for vertical layout. I can force Latin text to be rendered right
to left or Hebrew left to right (although such overrides are hardly
plain text issues), but there is no way I can select vertical layout
even for languages in which that is a normal way of writing. We already
have U+202A LEFT-TO-RIGHT EMBEDDING and U+202B RIGHT-TO-LEFT EMBEDDING.
It would be easy to define new characters TOP-TO-BOTTOM EMBEDDING and
BOTTOM-TO-TOP EMBEDDING, with similar scope until the next PDF
character.
Which scripts are written bottom to top in vertical layout?
Ogham and sometimes Tifinagh.
--
Michael Everson * * Everson Typography * * http://www.evertype.com
