anchor.diff:  
   == Rules
   
  -Whenever two rules are in conflict, use the order to decide which one trumps.
  +In case two rules are in conflict, and there is no explicit mention which rule trumps, the last mentioned rule applies.
   
   // Template:
   //. rule
  
positive.code: ----
  RETURN 1
  ----
  
negative.code: RETURN e.name
  ----
  
  . Write relationship types in upper case, using underscore to separate words.
  +
  .Bad
  