Each Node defined in this document has at least one ConformanceUnit (defined in OPC 10000-84) that requires the Node to be in the AddressSpace. If a Server supports a ConformanceUnit, it shall expose the Nodes related to the ConformanceUnit in its AddressSpace. If two Nodes are exposed, all References between the Nodes defined in this document shall be exposed as well.

The relations between Nodes and ConformanceUnits are defined at the end of the tables defining Nodes, one row per ConformanceUnit.