D.1 Example Client Server sequence flow using the RSL concept

The entities represented in the above sequence diagram (Figure 24) are as follows:

Application : The application that provides the relative spatial location information to the OPC UA Server that exposes the elements with this information.

Server : The OPC UA Server exposing the nodes with the relative spatial location information in its address space.

Client : The OPC UA Client that accesses the information exposed by the aforementioned server by using the OPC UA Services provided by the server.

User : The consumer application that uses the OPC UA Client (mentioned above).