The theory of classification: part 14: modification and objects like myself

The Theory of Classification to handle constructor-methods, through the use of which an object can create another object 'like itself', was discussed. It need implementations of List-methods like cons, heads and tail to manipulate the multimaps, which were essentially association lists with duplicate keys. A sequence of model state updates was modelled as a nested series of method invocations. The constructor-level recursion was a generally useful feature used in the theory for the definition of more complex kinds of datatype.