IEC 62541-6 OPC Unified Architecture - Part 6: Mappings

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Data sheet for OPC Unified Architecture - Part 6: Mappings

Title	OPC Unified Architecture - Part 6: Mappings
Version	2020
Document Number	62541-6
Release Date	OPC Unified Architecture - Part 6: Mappings
Reference	https://webstore.iec.ch/publication/61115

Note: The following is an excerpt from the official IEC catalog. It is provided here as a convenience and is not authoritative. Refer to the original document as the authoritative reference.

Abstract

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.