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• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.9.3 Evaluating Permissions with Roles
  they are not set the Server returns Bad_UserAccessDenied . Roles appear under the Roles Object in the Server Address Space . Each Role has mapping rules defined which appear as Properties ... Role Object (see OPC 10000-5 ). The examples shown in Table 3 illustrate how the standard mapping rules can be used to determine which Roles a Session has access