ISO 10303-521:2011 specifies the integrated resource constructs for Manifold subsurface.

The following are within the scope of ISO 10303-521:2011:

• 3D geometry;
• advanced faces;
• connected face sub sets;
• mappings and geometric transformations;
• open shells;
• relationships between domains of topological objects;
• subedges;
• subfaces;
• unbounded geometry with associated topological boundaries;
• use of topology to bound geometric entities.