ISO/TS 10303-1009:2010-07 specifies the application module for
Shape appearance layers.

The following are within the scope of
ISO/TS 10303-1009:2010-07:

• assignment of layers to shape items;
• assignment of visual attributes to shape items;
• assignment of colour to surfaces;
• assignment of visual attributes to curves belonging to surfaces;
• items within the scope of application module Appearance assignment, ISO/TS 10303-1001;
• items within the scope of application module Fill area style, ISO/TS 10303-1672;
• items within the scope of application module General surface appearance, ISO/TS 10303-1007;
• items within the scope of application module Layer assignment, ISO/TS 10303-1008.