{"version":"1.0","type":"rich","title":"Hierarchical Tree with Three Layers","description":"This example presents a three-layered hierarchical tree of programming languages, categorizing them into Compiled, Interpreted, and Scripting groups. Built with D3.js v7, it uses the `d3.stratify()` and `d3.tree()` layout APIs to position nodes, with `d3.linkVertical()` drawing the connecting paths. The SVG rendering colors circles by depth using `d3.scaleOrdinal()`, with labels for each language node. Data is defined inline in the HTML.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7412a1926bba4b42a9ab9ea684374786?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}