This example visualizes cardiotocogram data from the UCI Machine Learning Repository, presenting a scatter plot of two data fields colored by class alongside a small multiples navigator grid. The main chart uses vega-lite-api with `vl.markCircle` and encoded quantitative fields for x and y axes. A secondary chart repeats 4x4 mini plots for navigation, both rendered via vega-lite-api’s `repeat` and `config` options. Data loads asynchronously through d3.csv, and vega-tooltip provides interactive hover details.