The @dir attribute

The @dir attribute provides instructions to processors about how bidirectional text is rendered.

The @dir attribute identifies or overrides the text directionality. The following values are valid:

lro
Indicates an override of the Unicode Bidirectional Algorithm, forcing the element into left-to-right mode.
ltr
Indicates left-to-right.
rlo
Indicates an override of the Unicode Bidirectional Algorithm, forcing the element into right-to-left mode.
rtl
Indicates right-to-left.
-dita-use-conref-target
See Using the -dita-use-conref-target value for more information.