8.60 AttributeWriteMask
This is a subtype of the UInt32 DataType with the OptionSetValues Property defined. It is used to define the Attribute access restrictions of a Node. The AttributeWriteMask is formally defined in Table 44.
If a bit is set to 0, it means the Attribute is not writeable. If a bit is set to 1, it means it is writeable. If a Node does not support a specific Attribute, the corresponding bit has to be set to 0.
| Field | Bit | Description |
|---|---|---|
| AccessLevel | 0 | Indicates if the AccessLevel Attribute is writeable. |
| ArrayDimensions | 1 | Indicates if the ArrayDimensions Attribute is writeable. |
| BrowseName | 2 | Indicates if the BrowseName Attribute is writeable. |
| ContainsNoLoops | 3 | Indicates if the ContainsNoLoops Attribute is writeable. |
| DataType | 4 | Indicates if the DataType Attribute is writeable. |
| Description | 5 | Indicates if the Description Attribute is writeable. |
| DisplayName | 6 | Indicates if the DisplayName Attribute is writeable. |
| EventNotifier | 7 | Indicates if the EventNotifier Attribute is writeable. |
| Executable | 8 | Indicates if the Executable Attribute is writeable. |
| Historizing | 9 | Indicates if the Historizing Attribute is writeable. |
| InverseName | 10 | Indicates if the InverseName Attribute is writeable. |
| IsAbstract | 11 | Indicates if the IsAbstract Attribute is writeable. |
| MinimumSamplingInterval | 12 | Indicates if the MinimumSamplingInterval Attribute is writeable. |
| NodeClass | 13 | Indicates if the NodeClass Attribute is writeable. |
| NodeId | 14 | Indicates if the NodeId Attribute is writeable. |
| Symmetric | 15 | Indicates if the Symmetric Attribute is writeable. |
| UserAccessLevel | 16 | Indicates if the UserAccessLevel Attribute is writeable. |
| UserExecutable | 17 | Indicates if the UserExecutable Attribute is writeable. |
| UserWriteMask | 18 | Indicates if the UserWriteMask Attribute is writeable. |
| ValueRank | 19 | Indicates if the ValueRank Attribute is writeable. |
| WriteMask | 20 | Indicates if the WriteMask Attribute is writeable. |
| ValueForVariableType | 21 | Indicates if the Value Attribute is writeable for a VariableType. It does not apply for Variables since this is handled by the AccessLevel and UserAccessLevel Attributes for the Variable. For Variables this bit shall be set to 0. |
| DataTypeDefinition | 22 | Indicates if the DataTypeDefinition Attribute is writeable. |
| RolePermissions | 23 | Indicates if the RolePermissions Attribute is writeable. |
| AccessRestrictions | 24 | Indicates if the AccessRestrictions Attribute is writeable. |
| AccessLevelEx | 25 | Indicates if the AccessLevelEx Attribute is writeable. |
| Reserved | 26:31 | Reserved for future use. Shall always be zero. |