The example below shows the Edit window when you switch TOG4 to BND.
The first x, y, z indicates the first point on the line.
The second x, y, z indicates the ending point on the same line.
The last value represents the theoretical or actual length of the line.
feature_name=FEAT/LINE,TOG1,BND
THEO/x_cord,y_cord,z_cord,x_cord,y_cord,z_cord,length
ACTL/x_cord,y_cord,z_cord,x_cord,y_cord,z_cord,length
CONSTR/TOG2,TOG3,...,length
The example below shows the unbounded line format:
feature_name=FEAT/LINE, TOG1,UNBND
THEO/x_cord,y_cord,z_cord,i_vec,j_vec,k_vec
ACTL/x_cord,y_cord,z_cord,i_vec,j_vec,k_vec
CONSTR/TOG2,TOG3,...