Hi Michael and Hamish, thanks for your replies. To be more specific, the feature would enable nesting of named objects into named groups, to support the creation of a tree with an assembly, subassemblies and parts, similar to how SketchUp does nesting of components and groups in Outliner. My application is for industrial design, exporting the Moi files as OBJs for a WebGL viewer, where we want to persist the assembly tree. Maybe there's a way to do that with MoI as it is?

Cheers,
-p