When building a visualization, it is common to map numerical values (e.g., the result of some metrics) or properties to visual attributes. This mapping allows you to compare properties of represented elements easily and visually. Normalizers and scales are essential components of Roassal and provide an API to map a metric or a property to a visual cue (e.g., size, color, and font size).
All the code provided in this chapter is available at https://github.com/bergel/AgileVisualizationAPressCode/blob/main/02-06-Normalizers.txt.