Basically, nothing to do: the conversion must be performed by the DocBook-processing agent (which is not a standard feature).
Shape Italic
Color Blue
EndFont
+ DocBookTag para
+ DocBookAttr role='braille'
End
Shape Italic
Color Blue
EndFont
+ DocBookTag para
+ DocBookAttr role='braille-text'
End
Shape Italic
Color Green
EndFont
+ DocBookTag para
+ DocBookAttr role='braille-dots-on'
End
Shape Italic
Color Green
EndFont
+ DocBookTag para
+ DocBookAttr role='braille-dots-off'
End
Shape Italic
Color Green
EndFont
+ DocBookTag para
+ DocBookAttr role='braille-mirror-on'
End
Shape Italic
Color Green
EndFont
+ DocBookTag para
+ DocBookAttr role='braille-mirror-off'
End