marker_e

type marker_e = (

  marker_square,

  marker_diamond,

  marker_circle,

  marker_crossed_circle,

  marker_semiellipse_left,

  marker_semiellipse_right,

  marker_semiellipse_up,

  marker_semiellipse_down,

  marker_triangle_left,

  marker_triangle_right,

  marker_triangle_up,

  marker_triangle_down,

  marker_four_rays,

  marker_cross,

  marker_x,

  marker_dash,

  marker_dot,

  marker_pixel,

  end_of_markers

);