Pochampalli IT Labs: D3 three level collapsible Tree View Visualization example using Custom Visualization Component(CVC) in Jasper Design Studio (6.2/6.2.1 CE or Pro)
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DependenTree, Graph Visualization Library | Square Corner Blog
GitHub - grlicaa/D3CollapsibleTreeChart: Oracle Application Express (APEX) region Plug-in for D3 collapsible tree chart with multiple parents.
Tree Layout - D3 wiki
D3.js Drag and Drop, Zoomable, Panning, Collapsible Tree with auto-sizing. · GitHub