From RichardP1 previous post :
Blue = Business - Just for directions, no graphical map.
High = For Mk IV Nav computer with monitor - Current X5. Previous 5 (E39), 3 (E46), X3, Z4, etc.
Professional = For iDive vehicles with monitor - New 5 (E60), New 3 (E90) etc.

+RADARS = including searchable RADARS POIs

Roland