---
version: 1.1

var1: # a variable

family: # a family

  var2:  # a second variable

  subfamily: # a sub family

    variable:  # a variable
      - variable: ___.var1
      - variable: __.var2

family2: # a family

  var2:
    default:
      variable: __.family.var2

  subfamily:  # a sub family

    variable:  # a variable
      - variable: ___.var1
      - variable: ___.family.var2
      - variable: __.var2