----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: den 29 december 2001 08:47 Subject: Re: Vertical scripts (was: Tategaki (was: Re: Updated...))
> 1. Horizontal, that is, left-to-right (LTR) versus right-to-left (RTL). > 2. Vertical, that is, top-to-bottom (TTB) versus bottom-to-top (BTT). > 3. Priority of direction (e.g. (LTR, TTB) versus (TTB, LTR)). > [...] > An elaboration of the directional override mechanism to handle vertical > directionality would have to take priority into account as well. Instead of > two directionalities, LTR and RTL, the Unicode Standard would have to > consider eight. The Bidirectional Algorithm might have to become > Octodirectional, with a commensurate increase in complexity. Perhaps this is > the problem that is avoided by declaring vertical directionality to be a > higher-level "formatting style" issue. But it still seems arbitrary. Someone said that Unicode contains switches for LTR & RTL. By adding switches for TTB and BTT this problem could be solved. It would also be necessary to define a priority order (i.e. which of them that should come first). As an alternative solution, the current switches could be considered LTR, TTB and RTL, TTB. Then 6 other code points would be necessary for the other directions. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
