“…However, the modelling of domain-specific information into OPC UA meta-models is still lacking a • Integration of OPC UA with other protocols or software architectures in domains like SGs and CPPSs. The standards and languages that are being integrated are protocols for building automation systems (KNX, BACnet, LonWorks) [149], UML [150,160,166], IEC 61131 [148], IEC 61499 [158], DPWS [147,152], IEC 61850 [152,156,163,164], AutomationML [154,165], RobotML [155], CIM [159], DDS [161], REST [157], ISA 95 [15], and open-source middleware platform for IoT devices (OpenIoT) [141]. Once validated, the standardization of the developed integrating extensions/models should be achieved by submitting them to the OPC Foundation.…”