RequestHeader 
The fields of the RequestHeader DataType are defined in the following table:
| Name | Type |
|---|---|
| RequestHeader | Structure |
| authenticationToken | SessionAuthenticationToken |
| timestamp | UtcTime |
| requestHandle | IntegerId |
| returnDiagnostics | UInt32 |
| auditEntryId | String |
| timeoutHint | UInt32 |
| additionalHeader | Structure |
The representation of the RequestHeader DataType in the address space is shown in the following table:
| Name | Attribute |
|---|---|
| NodeId | i=389 |
| NamespaceUri | http://opcfoundation.org/UA/ |
| BrowseName | RequestHeader |
| IsAbstract | False |
| SubtypeOf | Structure |
| Categories |