This visualization presents a hierarchical training dataset as an interactive tree diagram, using a horizontal link layout with labeled nodes whose font size decreases with depth. The SVG rendering relies on d3.tree, d3.hierarchy, d3.stratify, and d3.linkHorizontal, with data loaded from an external CSV via d3.csv. Pan and zoom controls are implemented using d3.zoom, and node text includes white shadows for readability against the teal paths.