Definitions and Semantic Simulations Based on Object-Oriented Analysis
  and Modeling
  We have proposed going beyond traditional ontologies to use rich semantics
implemented in programming languages for modeling. In this paper, we discuss
the application of executable semantic models to two examples, first a
structured definition of a waterfall and second the cardiopulmonary system. We
examine the components of these models and the way those components interact.
Ultimately, such models should provide the basis for direct representation.
