Each node at Level 2 may have other branches at lower levels. The scheme for navigation developed here allows the user to see where the current location is. It also allows a return to any previous traversed node in ONE step. A parent has at least one child. The lowest nodes are called leaves .
Parents can communicate with their children, and the children can communicate with their parents.
However, communication between children is discouraged. The path is always visible to any child, so there is no confusion about the ancestors. It also diminishes chances of being lost in the tree. If a child is allowed to jump to any node, the sense of belonging to a system vanishes very quickly. Yes, if you allow it to happen.