Data Tree
Complex data in Grasshopper, that is, data that is more structured than a singleton or a simple list, is stored in a "data tree".
Part of Grasshopper
Part Type Entity
Screenshot Grasshopper Data Tree.png


Data Tree Editing
TUDelft web resource presenting data trees and how to manipulate them.
Working with Data Trees
A ModeLab introductory tutorial on Data Trees - skip to the last video for the heart of the discussion.
Advanced Topics in Grasshopper
A discussion by David Rutten on advanced tools for working with Data Trees. Topics include: Editing data tree structures, Custom mapping functions, Offsets within and between trees, Selection rules for items in data trees.