| 摘要 |
A system, method, program product and service for navigating and displaying hierarchically structured data. A system is provided that includes: a graphical data display system for displaying a structured diagram having a plurality of nodes; a navigation system for allowing a user to launch a viewport at a selected node within the structured diagram to view subnodes of the selected node; and a context maintenance system that maintains a visual context between each of the plurality of nodes and subnodes within the structured diagram.
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