3 Terms, definitions and conventions ToC Previous Next

3.4 Conventions used in this document ToC Previous Next

3.4.3 Common Attributes ToC Previous Next General ToC

The Attributes of Nodes, their DataTypes and descriptions are defined in OPC 10000-3 Attributes not marked as optional are mandatory and shall be provided by a Server. The following tables define if the Attribute value is defined by this specification or if it is server-specific.

For all Nodes specified in this specification, the Attributes named in Table 3 shall be set as specified in the table.

Attribute Value
DisplayName The DisplayName is a LocalizedText. Each server shall provide the DisplayName identical to the BrowseName of the Node for the LocaleId “en”. Whether the server provides translated names for other LocaleIds is server-specific.
Description Optionally a server-specific description is provided.
NodeClass Shall reflect the NodeClass of the Node.
NodeId The NodeId is described by BrowseNames as defined in
WriteMask Optionally the WriteMask Attribute can be provided. If the WriteMask Attribute is provided, it shall set all non-server-specific Attributes to not writable. For example, the Description Attribute may be set to writable since a Server may provide a server-specific description for the Node. The NodeId shall not be writable, because it is defined for each Node in this specification.
UserWriteMask Optionally the UserWriteMask Attribute can be provided. The same rules as for the WriteMask Attribute apply.
RolePermissions Optionally server-specific role permissions can be provided.
UserRolePermissions Optionally the role permissions of the current Session can be provided. The value is server-specific and depends on the RolePermissions Attribute (if provided) and the current Session.
AccessRestrictions Optionally server-specific access restrictions can be provided.

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