IEC 62541-12:2020规定了OPC统一体系结构（OPC UA）客户端和服务器在不同场景中使用时如何与DiscoveryServer交互。它指定了LocalDiscoveryServer、LocalDiscoveryServer ME和GlobalDiscoveryServer的要求。它还定义了证书管理、密钥凭证管理和授权服务的信息模型。

IEC 62541-12:2020 specifies how OPC Unified Architecture (OPC UA) Clients and Servers interact with DiscoveryServers when used in different scenarios. It specifies the requirements for the LocalDiscoveryServer, LocalDiscoveryServer-ME and GlobalDiscoveryServer. It also defines information models for Certificate management, KeyCredential management and Authorization Services.