EI
https://github.com/archimatetool/archi/issues/576
"a significant feature for Archi 4.7 EA is importing and merging an Archi model into another Archi model.
This allows you to either merge one or models, or to create a reference model that you can initially import into a model, then maintain and update it separately and re-import it back into the target model adding new concepts and Views, or updating existing ones."