ISO/TS 10303-1631:2006 specifies the application module for Area 2D.
The following are within the scope of ISO/TS 10303-1631:2006:
- definition of primitive areas in two dimensional space;
- items within the scope of application module Extended basic geometry, ISO/TS 10303-1667;
- items within the scope of application module Value with unit extension, ISO/TS 10303-1753.