The single largest aspect of DrawingML is Layout. Ultimately, layout is responsible for defining all aspects of the diagram outside of color and style. It defines how the diagram looks, how it behaves, and how the data is to be mapped. Figure 6 shows different examples of how layout works to create a diagram holding the data ‘1’, ‘2’, and ‘3’.

Figure 17: Different layouts mapping the data 1, 2, and 3 to four different diagrams

There are two aspects to layout: defining the numerous complex types utilized by diagram definitions, and the diagram definitions themselves. Diagram definitions are a fundamental part of layout, and utilize everything in order to define new diagrams.