To provide links to digital records, the ObjectType DocumentationLinksType is introduced, which is deployed as AddIn on Objects representing assets. The AddIn serves as entry point to Variables linking to digital records managed outside the Server. The Variable contains a URI, which is typically a URL. Vendors might add additional Properties defining meta data of the linked document, e.g. type of file or size. In addition, it optionally provides the capabilities to add and remove editable links to user-defined documents like operator’s handbooks.

In Figure 6, an example of using the DocumentationLinks AddIn is given.

Figure 6 – Example of the DocumentationLinks AddIn

Instead of providing the optional Methods to add and remove links, a server not capable of the dynamics in its AddressSpace might also just provide some writable Variables that the user can edit and thus manage its links.