Which one of the nodes of a selector is named the "root node"?

The concept of a "root node" in a selector refers to the highest-level node within a hierarchical structure, such as a tree. This node serves as the foundational point from which other nodes branch out, representing the entire structure of the application or system being modeled.

In automation development, the root node encapsulates all other nodes and elements, providing a comprehensive reference for identifying and interacting with components within the application. As the topmost node, it typically corresponds to the entire application landscape, which can include various screens, components, and functionalities that are organized beneath it.

Understanding the designation of the root node is crucial. It enables developers to establish a clear starting point for navigating through the subsequent nodes that represent different layers of the application. In contrast, lower-level nodes, which may represent specific components or GUI elements, depend on the root node for their organizational context. Hence, recognizing the highest-level node as the root underscores the organizational structure and is key to effective automation strategies.