Definitions for "Root node"
Keywords:  node, keykos, tree, children, xml
One of the three principle nodes making up a domain (in KeyKOS for the S/370); specifically, the node which contains such keys as the address segment key and meter key. See "Domain key".
The root node is the tree node that has no branches leading to it from other nodes. A root has no parent node. The root is usually used as the label for whole tree.
A distinguished node in a tree that has more than one connecting edge. In particular, in a directed tree the root node has an arbitrary number of outgoing edges and no incoming edge. See Also Tree.
The original sequence of any specific clan mother or father.