A hierarchy tree is a graphical representation that illustrates the hierarchical relationship between different elements or entities. It organizes them into levels or layers based on their parent-child relationships.
Imagine you have folders on your computer organized into subfolders within subfolders. The top-level folder represents the root node, and each subsequent level represents child nodes branching out from their parent nodes. This hierarchical structure resembles a hierarchy tree.
Parent Node: In a hierarchy tree, the parent node refers to the node above another node. It is the immediate ancestor or superior of a specific node.
Child Node: In a hierarchy tree, the child node refers to the node below another node. It is the immediate descendant or subordinate of a specific node.
Leaf Node: A leaf node, also known as a terminal node, is a node in a hierarchy tree that does not have any child nodes. It represents the end point or final element in the hierarchy.
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