Merging Modeling and Programming Using Umple

We discuss how Umple merges modeling and programming by adding modeling constructs to programming languages and vice-versa. Umple has what we call model-code duality; we show how it fulfills key attributes of being both a programming language and a modeling technology. Umple also has what we call text-diagram duality in that the model or code can be updated by editing the textual or diagram form. We give an example of Umple, and explain how key benefits of textual programming languages are found in Umple, as are important features of modeling technology.