This example visualizes the Iris dataset, comparing sepal length and width across three species using a D3.js scatter plot. The chart uses `d3.csv` to load data from a remote source and `d3.scaleLinear` and `d3.scaleOrdinal` for positioning and color mapping. Interactive legend highlighting via mouse events fades non-hovered points, with the visual configuration controlled by a dedicated config file and stylized using BBC color themes.