{"version":"1.0","type":"rich","title":"Untitled","description":"This interactive tree diagram visualizes U.S. permanent visa categories and subcategories from a JSON dataset, with nodes collapsed by default and expandable via clicks. It uses D3 v3’s `d3.layout.tree` and `d3.svg.diagonal` for the positional layout and curved links, rendered as SVG with animated transitions (`transition().duration()`) that move nodes and paths smoothly between states. Node styling distinguishes collapsed nodes with lightsteelblue circles, while the hierarchy’s depth is normalized vertically at 180-pixel increments.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a3b133183be141c5b974345338ab2ee7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}