CSN EN IEC 62541-4 ed. 4

CSN EN IEC 62541-4 ed. 4 This part of IEC 62541 defines the OPC Unified Architecture (OPC UA) Services. The Services defined are the collection of abstract Remote Procedure Calls (RPC) that are implemented by OPC UA Servers and called by OPC UA Clients. All interactions between OPC UA Clients and Servers occur via these Services. The defined Services are considered abstract because no particular RPC mechanism for implementation is defined in this document
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.