This example visualizes a small directed network graph with seven nodes and six weighted links, using labeled circles to represent entities and lines to show connections. The graph is rendered as SVG and positioned through a force-directed layout, with link stroke widths reflecting each connection’s weight. It relies on the older `d3.layout.force` API from d3.v2 (loaded alongside d3.v4) to simulate physics, while node dragging is enabled via `force.drag`. The data comes from an embedded `graphFile.json` file, and styling uses CSS.