> "models the hierarchical organization of data as a tree in which each node has a name, and either a value or a set of child nodes" That matches the structure

> "models the hierarchical organization of data as a tree in which each node has a name, and either a value or a set of child nodes" That matches the structure of Lisp. Lisp code is basically set out as an AST. A Lisp node basically either contains a function and a list, or a function and simple value(s). The former can be thought of as a parent node, the latter can be thought of as a child node.