EN IEC 62541-5:2026

OPC unified architecture - Part 5: Information Model EN IEC 62541-5:2026

Publication date:   Mar 17, 2026

Scope

IEC 62541-5:2026 This edition includes the following significant technical changes with respect to the previous edition:

a) Annex B has been removed and used to create IEC 62451-16;

b) Annex C has been removed and used to create IEC 62451-20;

c) currency information model has been added;

d) information model for Interfaces and AddIns has been added;

e) information model for Method Metadata has been added;

f) MaxSessions, MaxSubscriptions, and MaxMonitoredItems have been added to capabilities;

g) information model for ordered list of objects has been added;

h) PortableQualifiedName and PortableNodeId DataTypes have been added;

i) UriString DataType has been added;

j) SemanticVersionString DataType has been added;

k) AssociatedWith Reference Type has been added;

l) ConfigurationVersion Property has been added to NamespaceMetadataType;

m) AuditClientEventType and AuditClientUpdateMethodResultEventType have been added;

n) ModelVersion has been added to NamespaceMetadataType;

o) NoTransparentBackupRedundancyType has been added to support a Primary/Standby use case;

p) BitFieldType and BitFieldDefinitionType have been added.

This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.