anchor.diff:      inherit content;
     };
   
  -  # Create a "ThenElse" property which contains choices which can choosed by
  +  # Create a "ThenElse" property which contains choices being chosen by
     # the evaluation of an "If" statement.
     isThenElse = attrs: (typeOf attrs) == "then-else";
     mkThenElse = attrs:
  
positive.code:     else
        p;
  
    # Ignore all values which have a higher value of the priority number.
    onOverrideGlobalEval = valList:
      let
        defaultPrio = 100;
  
negative.code:   mkNotdef = {_type = "notdef";};
  
    # General property type, it has a property attribute and a content
    # attribute.  The property attribute refers to an attribute set which
    # contains a _type attribute and a list of functions which are used to
    # evaluate this property.  The content attribute is used to stack properties
    # on top of each other.
    # 
    # The optional functions which may be contained in the property attribute
  