> 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? If I remember well then both latin and hebrew script are written top to bottom.
