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parent-child relationship

PCR for short. A parent-child relationship is a directed hierarchy edge between two hierarchy nodes. It defines the type of the nodes. A hierarchy node with outbound edges is a parent node. A hierarchy node with inbound edges is a child node. A hierarchy node with no inbound edges is a root node or an orphan node. A hierarchy node with no outbound edges is a leaf node.

Other versions: 7.31 | 7.40 | 7.54