统一架构 第3部分：地址空间模型

[中文适用范围]： IEC 62541-3:2025 RLV包含了官方的IEC国际标准及其红线版本。红线版本仅提供英文版本，为您提供一种快速简便的方式，用于比较官方IEC标准与其前一版之间的所有变更。IEC 62541-3:2025描述了OPC统一架构（OPC UA）的地址空间及其对象。该规范是OPC UA元模型，OPC UA信息模型均基于此元模型。此第四版取消并替代了2020年发布的第三版。本版构成技术修订。本版相比前一版，包括以下重大技术变更：a）新增接口和插件的概念及建模元素；b）新增货币；c）新增方法元数据，用于为方法参数定义额外属性；d）新增ApplyRestrictionToBrowse位至AccessRestrictionType；e）新增非易失存储位至AccessLevelExType；f）新增常量位和配置常量位至AccessLevelExType；g）视图节点类已更改，以与对象节点类定义事件通知者的方式相同，将其定义为事件通知者类型；h）修正HasNotifier、HasEventSource和Organizes，以包含对象类型作为有效的源节点；i）命名规则已弃用；j）新增关联参考类型（AssociatedWith ReferenceType）。 [外文原描述]： IEC 62541-3:2025 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. 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.