Private Extensions of AP203
Using new compound_representation_item and representation_item_relationship from part 43.2
Organized in four data sections (SdaiModels):
3D shape_representation for tessellation data (triangles) with normals on vertex points (OpenGL) and mapping info to A-BREP
2D shape_representation for Layout data
Exposure data (Projection information),Mapping of the 3D-vertices and edges into 2D