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IEC 62541-6 Ed. 3.0 b:2020

OPC Unified Architecture - Part 6: Mappings

IEC 62541-6:2020 is available as IEC 62541-6:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62541-6:2020 specifies the OPC Unified Architecture (OPC UA) mapping between the security model described in IEC TR 62541-2, the abstract service definitions specified in IEC 62541-4, the data structures defined in IEC 62541-5 and the physical network protocols that can be used to implement the OPC UA specification. This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
 a) Encodings:
 • added JSON encoding for PubSub (non-reversible);
 • added JSON encoding for Client/Server (reversible);
 • added support for optional fields in structures;
 • added support for Unions.
 b) Transport mappings:
 • added WebSocket secure connection – WSS;
 • added support for reverse connectivity;
 • added support for session-less service invocation in HTTPS.
 c) Deprecated Transport (missing support on most platforms):
 • SOAP/HTTP with WS-SecureConversation (all encodings).
 d) Added mapping for JSON Web Token.
 e) Added support for Unions to NodeSet Schema.
 f) Added batch operations to add/delete nodes to/from NodeSet Schema.
 g) Added support for multi-dimensional arrays outside of Variants.
 h) Added binary representation for Decimal data types.
 i) Added mapping for an OAuth2 Authorization Framework.

International Electrotechnical Commission [iec]

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