{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A collapsible tree visualization maps the hierarchical structure of Wikipedia categories, comparing the number of subcategories between Russian and English versions. Node color encodes the difference in subcategory counts, with a legend explaining the scale. The visualization uses D3 v5’s `tree` layout and `linkVertical` path generator to position SVG circles and links, with `d3.scaleLinear` mapping group values to a purple-to-white color range. Zoom and pan are enabled via `d3.zoom`, and the data is loaded asynchronously from a JSON file using `d3.json`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3d1c8be9be4f4c7e966552190f662a8d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}