Example with all variables modifiable

rougail:                      # Rougail
  var:                        # A suffix variable
    - val1
    - val2
  val1_dyn:                   # A dynamic family
    var1: val1                # Value is suffix
    var2: val1                # Value is first variable
    var3: val1                # Value is relative first variable
    var4: val1                # Value is first variable of val1
  val2_dyn:                   # A dynamic family
    var1: val2                # Value is suffix
    var2: val2                # Value is first variable
    var3: val2                # Value is relative first variable
    var4: val1                # Value is first variable of val1