This is a really impressive tool, but there's some functionality that'd be incredibly useful to me concerning object categorization, so I hope you don't mind me leaving a feature request:
The first feature that would be super useful would be the ability to somehow compartmentalize objects of the same category.
The second, admittedly more involved feature, but one that I think would be really powerful would be the ability to place objects in multiple categories
I realize you can kind of approximate some of this of functionality using properties, but it'd really useful to, for example, quickly get a list of all Underworld Deities without having to open up graph view, categorize all of them exclusively as Underworld Deities or personally maintain a list.
I appreciate this kind of functionality may well be no small task to implement, so I understand if this outside the scope of this project, but I wanted to leave a comment all the same. Thank you for all your hard work!