The ObjectType FolderTypeis formally defined in OPC 10000-5. Its purpose is to provide Objectsthat have no other semantic than organizing of the AddressSpace. A special ReferenceTypeis introduced for those Folder Objects, the Organizes ReferenceType. The SourceNodeof such a Referenceshould always be a Viewor an Objectof the ObjectType FolderType; the TargetNodecan be of any NodeClass. Organizes Referencescan be used in any combination with HasChild References(HasComponent, HasProperty, etc.; see 7.5) and do not prevent loops. Thus, they can be used to span multiple hierarchies.