This example demonstrates a WebCola constraint-based graph layout applied to a small set of unattached STIX threat-intelligence entities, including a software, file, and process node. The visualization partitions the SVG canvas into three horizontal bands representing promoted, attached, and unattached categories, using fixed boundary nodes and separation constraints to keep nodes within their designated regions. The code loads data from a JSON file via D3’s `json` method and uses WebCola’s `d3adaptor` for simulation, with SVG rectangles drawn for the region boundaries.