统一架构 第17部分：别名

[中文适用范围]： IEC 62541-17:2025 对 AliasNames 功能进行了定义。AliasNames 提供了一种为系统中的任何节点配置并暴露一个备用且明确命名的方法。这种方式类似于在 IP 网络中使用域名作为 IP 地址的别名。类似于 DNS 服务器，支持 AliasNames 的 OPC UA 服务器提供了一种查找方法，可以将 AliasName 转换为对应节点的 NodeId。一个聚合服务器可以从多个服务器收集这些 AliasNames，并提供查找方法，使客户端应用程序能够系统性地发现 NodeId。聚合服务器还可以为不支持 AliasNames 的其他服务器中的节点定义 AliasNames。可以构建一个 GDS，自动聚合所有已注册到 GDS 的服务器上定义的 AliasNames。在这种情况下，GDS 还会通过一个已知的端点和地址为客户端提供查找机制。 [外文原描述]： IEC 62541-17:2025 provides a definition of AliasNames functionality. AliasNames provide a manner of configuring and exposing an alternate well-defined name for any Node in the system. This is analogous to the way domain names are used as an alias to IP addresses in IP networks. Like a DNS Server, an OPC UA Server that supports AliasNames provides a lookup Method that will translate an AliasName to a NodeId of the related Node on a Server. An aggregating Server can collect these AliasNames from multiple Servers and provide a lookup Method to allow Client applications to discover NodeIds on a system wide basis. An aggregating Server could also define AliasNames for Nodes in other Servers that do not support AliasNames. A GDS can be constructed that would automatically aggregate all AliasNames that are defined on any Server that has registered with the GDS. In this case, the GDS also provides the lookup mechanism for Clients at a well-known endpoint and address.