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A force-directed network diagram shows six interconnected nodes (brands, products, cart, cart_items) with directed, curved links. The code uses `d3.layout.force()` from D3 v3 to simulate the physics, `d3.select` for DOM manipulation, and SVG markers for arrowheads on the three link types (licensing, suit, resolved). Node labels display both an ID and name, and circles are draggable via `force.drag`. The graph analyzes e-commerce relationships among entities.