{Typesetting and Layout in Multiple Directions}
{John Plaice}
{I propose a new, general way of looking at typesetting and layout
in multiple directions.  It subsumes the left-to-right and
right-to-left horizontal writing used in most of the world,
as well as the vertical writing used in East Asia.  The generality
allows the development of layout schemes for situations when
several writing directions appear on the same page.

The key to the approach is that managing multidirectional
text requires a separation of writing style from box direction.
It turns out that there are only three different kinds of
writing style, and eight kinds of directional box, and that
simple rules can be used to define how these different writing
styles may appear in different kinds of box.
}