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DAIS (as well as OPC) structure nodes and items hierarchically. Nodes and items have a label uniquely identifying child’s
located at the same node. The labels from the nodes in the path from a node or item to the root form a pathname. The pathname
uniquely identifies a node or item in the tree.
The same principle for naming objects is described in the IEC 1346-1 standard. IEC 1346-1 call labels for single level designation
and the pathname for multi level designation and supports multiple hierarchical structures. The DAIS supports multiple structures
by allowing multiple views where each view exposes one structure.