RATIONALE "Bhatta, Goel & Prabhakar, IDEAL" S. Bhatta, A. Goel, and S. Prabhakar, Innovation in Analogical Design: A Model-Based Approach, Proc. Third Int'l Conf. AI in Design, Kluwer, 1994, pp. 57-74. This paper is included because it shows some of the power of having a rich representation: especially one based on a detailed account structure, behavior and function. Analogical reasoning (with association as the key part) is seen as an essential part of creativity. Analogy is possible within a domain -- the simplest version can be seen as CBR. Cross-domain analogy can lead to very inventive concepts. However, finding and then mapping source analogs is a far from trivial problem.