Example with mandatory variables not filled in

---                                                                             
family1:                                                                        
  variable1: example                                                            
family2:                                                                        
  variable2: example                                                            

Example with all variables modifiable

---                                                                             
family1:                                                                        
  variable1: example                                                            
family2:                                                                        
  variable2: example