Example with mandatory variables not filled in

var1: example
family:
  var2: string6
  subfamily:
    variable:
      - example
family2:
  subfamily:
    variable:
      - example

Example with all variables modifiable

var1: example
family:
  var2: string6
  subfamily:
    variable:
      - example
family2:
  var2: string6
  var3: string5
  subfamily:
    variable:
      - example