[Armin]

Alternatively, if you have it already working one way, the childof() tag does the inverse of parentof(), and has an item make itself a child of an existing trait.

Honestly, I don't know if parent/child will work (points-wise and organizationally) correctly inside an owner/component (what templates do) structure.

You may be better served to make a mini-template of your desired parent/child, and add that template from the owning template.