ISO/TS 10303-1327:2010-03 specifies the application module for
Compound shape representation.

The following are within the scope of
ISO/TS 10303-1327:2010-03:

• representation of a topologically connected three dimensional geometry model
  with elements of different dimensionality including wireframe models,
  manifold and non manifold surfaces models;
• items within the scope of application module Edge based wireframe, ISO/TS 10303-1501;
• items within the scope of application module Non manifold surface, ISO/TS 10303-1324.