Example with mandatory variables not filled in

---                                                                             
rougail:                      # Rougail                                         
  family1:                    # The first family                                
    var: example                                                                
  family2:                    # The second family                               
    var: example                                                                

Example with all variables modifiable

---                                                                             
rougail:                      # Rougail                                         
  family1:                    # The first family                                
    var: example                                                                
  family2:                    # The second family                               
    var: example