Hi Paul, yes that is correct. But for example curves can be either a stand-alone individual curve object, or a brep also has edge curves that are sub-objects that belong to the brep.
It might be possible to make point objects work in a similar way, with edit points as sub-objects of a curve or brep. I didn't try that so far because it can possibly mean adding a lot of additional data to save since each point would then have more attributes on it like an ID, etc...., and sometimes there are a lot of points, so I'm a bit worried about kind of bloating things up.
- Michael
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