Catalogue, Family, Part, Item

HI there,

I'm new to AECOsim. I have started my journey some day ago. Initially, I have stuck with the concept or catalogue, family, part, and items. I can get how elements are grouped here in AECOsim. Could anyone please help me by example. 

For example in Revit, we have Category, Family, type, and instance. How could we define these things in AECOsim?

For example a double panel window or door. How to categories it ?

Thanks and Regards,

Usman