IEC 62541-3-ed.4.0

Annotation of standard text IEC 62541-3-ed.4.0 :

IEC 62541-3: 2025 describes the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This specification is the OPC UA meta model on which OPC UA information models are based. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of the concept and modelling elements for Interfaces and AddIns; b) addition of Currency; c) addition of Method Meta Data to define additional attributes for Method Arguments; d) addition of ApplyRestrictionToBrowse bit to AccessRestrictionType; e) addition of a Non-Volatile Storage bit to AccessLevelExType; f) addition of a Constant bit and ConfigurationConstant bit to AccessLevelExType; g) the View NodeClass has been changed to define the EventNotifier as an EventNotifierType in the same way the Object NodeClass defines it; h) correctition of HasNotifier, HasEventSource, and Organizes, to include ObjectType as valid source node; i) NamingRules have become deprecated; j) addition of AssociatedWith ReferenceType. IEC 62541-3: 2025 decrit lAddressSpace de lArchitecture unifiee OPC (OPC UA) et ses Objets. La presente specification correspond au metamodele OPC UA sur lequel se fondent les modeles dinformation OPC UA. Cette quatrieme edition annule et remplace la troisieme edition parue en 2020. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) ajout du concept et des elements de modelisation pour les Interfaces et AddIns; b) ajout de Currency; c) ajout des Metadonnees de Methode afin de definir des attributs supplementaires pour les Arguments de Methode; d) ajout du bit ApplyRestrictionToBrowse a AccessRestrictionType; e) ajout dun bit de memoire remanente a AccessLevelExType; f) ajout dun bit Constant et dun bit ConfigurationConstant a AccessLevelExType; g) modification de la NodeClass View pour definir lEventNotifier comme un EventNotifierType de la meme maniere que la NodeClass Object le definit; h) correction de HasNotifier, HasEventSource et Organizes afin dinclure ObjectType comme noud source valide; i) depreciation de NamingRules; j) ajout du ReferenceType AssociatedWith.