CS 342 Lecture -*- Outline -*-

* Design with Data Abstractions
        Variation on stepwise refinement where look for data abstractions

        (Use example of term project)

        To help decide what data abstractions are needed ask:
                *What are the possible changes one might make to this program?
                        (changes in requirements)
                *Are there alternative representations that make sense?
                (In CLU, also need to use a cluster if have self reference
                        e.g., linked lists)

	Identify the data and procedural absractions
		then descend down a level...