tree_structured_categories.yml

- name: 0
  subcategories:
    - name: 00
      subcategories:
        - name: 000
        - name: 001
        - name: 002
    - name: 01
      subcategories:
        - name: 010
        - name: 011
        - name: 012
    - name: 02
      subcategories:
        - name: 020
        - name: 021
        - name: 022
    - name: 03
    - name: 04
    - name: 05

- name: 1
  subcategories:
    - name: 10
    - name: 11
    - name: 12
      subcategories:
        - name: 120
        - name: 121
        - name: 122

- name: 2
  subcategories:
    - name: 20
    - name: 21
      subcategories:
        - name: 210
        - name: 211
        - name: 212
    - name: 22
      subcategories:
        - name: 220
        - name: 221
        - name: 222

- name: 3