The AppSymphony ‘flow diagram’, or ‘diagram’ for short is the heart of a composed app. A flow diagram is a model that describes information work to be performed. The model is implemented using a graph consisting of components and connectors as shown in the figure. From a user’s perspective, the diagram is literally the place where you drag-and-drop components and connect them together to describe what you want your app to do. The following sections describe the key elements of a flow diagram.