ISO/TS 10303-1748 specifies the application module for Stratum non planar shape.

The following are within the scope of ISO/TS 10303-1748:

• representation of a surface in an interconnect substrate using an open manifold surface;
• items within the scope of application module Layered interconnect module design, ISO/TS 10303-1698;
• items within the scope of application module Manifold surface, ISO/TS 10303-1509.