At:
http://www.ccs.neu.edu/research/demeter/sources/DemeterJava/examples/j-check-TBR1/README

The three programs in
../j-check-TBR1
../j-check-TBR2
../j-check-TBR3

Presents an evolution of the Terminal-Buffer-Rule checker
(page 393 of AP book)
over three increasingly larger class dictionaries.
See also:
http://www.ccs.neu.edu/research/demeter/course/f96/hw/3/assign.html
For the first two class dictionaries, the adaptive programs are identical.
For the third one, the adaptive program needed to be adjusted.
Both the traversal specifications and the Java programs.

The three programs serve as an example of how adaptive programs
should be developed. Initially a barebone class dictionary is used
to get the program going. The class dictionary is gradually enlarged
to add more behavior.

An evolutionary mechanism is needed so that only the first program needs 
to be updated and then the third can be created automatically
for many evolutions of the first program.
Evolution history linking would be a good name for such a mechanism.
The advantages would be that multiple variants of the the same program
could be maintained more easily.