The IsDeprecated ReferenceType is a concrete ReferenceType and can be used directly. It is a subtype of the NonHierarchicalReferences ReferenceType.
The semantic of this ReferenceType is to indicate that a Node has been deprecated from an information model.
The SourceNode of this ReferenceType shall be a Node of any NodeClass. The TargetNode shall be an Object which represents the information model version where the Node was first deprecated. The DisplayName and Description of the TargetNode should suggest the information model version and other suggestions.