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Multi-Way Star-Tree Aggregation

  • Start depth-first search at the root of the base star tree
  • At each new node in the DFS, create corresponding star tree that are descendents of the current tree according to the integrated traversal ordering
    • E.g., in the base tree, when DFS reaches a1, the ACD/A tree is created
    • When DFS reaches b*, the ABD/AD tree is created
  • The counts in the base tree are carried over to the new trees

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