type ShadingType = enumeration(None "None", BuildingShade "Buildings shade", Overhang "Overhang", SideFins "Side fins", Box "Box: overhang and side fins", Screen "Screen", OverhangAndScreen "Overhang and screen", BoxAndScreen "Box and screen", HorizontalFins "Horizontal fins", OverhangAndHorizontalFins "Overhang and horizontal fins", Shading "Shading");