This example shows an interactive collapsible tree diagram rendered as SVG boxes, with nodes representing a hierarchical data structure from a JSON file. Each node displays a name, type, code, and version, with links labeled by direction (SYNC or ASYN). The visualization uses D3.js v3 layout and zoom behaviors, with click interactions to expand and collapse child nodes. Rectangles, curved links, and tooltips are styled through CSS, and animated transitions smoothly update the layout.