Annex C defines a graphical notation for OPC UA data. Annex C is normative, that is, the notation is used in this document to expose examples of OPC UA data. However, it is not required to use this notation to expose OPC UA data.

The graphical notation is able to expose all structural data of OPC UA. Nodes, their Attributes including their current value and References between the Nodes including the ReferenceType can be exposed. The graphical notation provides no mechanism to expose events or historical data.