Reference

OpcAttribute Enum

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Also in

Opc.UaFx.Client

Identifies the different attributes which define the characteristics and additional metadata of a node.

Syntax

public enum OpcAttribute

Public Enum OpcAttribute

Inheritance

Object → ValueType → Enum → OpcAttribute

Fields

Name	Value	Description
AccessLevel	17	Indicates the accessibility of the Value of a variable not taking user access rights into account. If the OPC UA Server does not have the ability to get the AccessLevel information from the underlying system then it should state that it is read and writable. If a read or write operation is called on the variable then the Server should transfer this request and return the corresponding status code even if such a request is rejected.
AccessLevelExsince v2.58	27	Extends the AccessLevel of a variable by further characteristics of the accessibility of its Value, such as whether it is written atomically. The value is a uint whose lower 8 bits are those of the AccessLevel (OPC 10000-3, AccessLevelExType).
AccessRestrictionssince v2.58	26	Indicates the restrictions of the access to the node, such as that it is only accessible with a signed or encrypted connection. The value is a ushort (OPC 10000-3, AccessRestrictionType).
ArrayDimensions	16	The length for each dimension of an array value.
BrowseName	3	A non-localized, human readable name for the node.
ContainsNoLoops	11	Indicates that following forward references within a view will not cause a loop.
DataType	14	The node id of the data type for the variable value.
DataTypeDefinitionsince v2.57	23	The definition of a data type, which states the fields of a structure or the values of an enumeration. Read by a client, the value is the OpcDataTypeInfo of the data type, the same as the client provides by its GetDataType method.
Description	5	A localized description for the node.
DisplayName	4	A localized, human readable name for the node.
EventNotifier	12	Indicates that the node can be used to subscribe to events.
Executable	21	Whether the method can be called.
InverseName	10	The browse name for an inverse reference.
IsAbstract	8	Indicates that a type node may not be instantiated.
IsHistorizing	20	Indicates whether the Server is actively collecting data for the history of the variable.
MinimumSamplingInterval	19	Specifies how fast the Server can reasonably sample the value for changes. The accuracy of this value (the ability of the Server to attain 'best case' performance) can be greatly affected by system load and other factors.
NodeCategory	2	Defines the OpcNodeCategory of a node the thereby supported set of attributes by each category of node.
NodeId	1	The canonical identifier for the node.
RolePermissionssince v2.58	24	The permissions which apply to the node for each role, not taking the user of the session into account. The value is an array of OpcRolePermission.
Symmetric	9	Indicates that forward and inverse references have the same meaning.
UserAccessLevel	18	Indicates the accessibility of the Value of a variable taking user access rights into account. If the OPC UA Server does not have the ability to get any user access rights related information from the underlying system then it should use the same bit mask as used in the AccessLevel attribute. The UserAccessLevel attribute can restrict the accessibility indicated by the AccessLevel attribute, but not exceed it.
UserExecutable	22	Indicates whether a method is executable, taking user access rights into account. If the OPC UA Server cannot get any user rights related information from the underlying system, it should use the same value as used in the executable attribute. The UserExecutable attribute can be set to 'False', even if the executable attribute is set to 'True', but it shall be set to 'False' if the executable attribute is set to 'False'.
UserRolePermissionssince v2.58	25	The permissions which apply to the node for each role of the user of the session. The value is an array of OpcRolePermission.
UserWriteAccess	7	Indicates which attributes are writable by the current user of the client of a node taking user access rights into account.
Value	13	The value of a variable.
ValueRank	15	The number of dimensions in the value of a variable.
WriteAccess	6	Exposes the possibilities of a client to write the attributes of the node. The WriteAccess attribute does not take any user access rights into account, that is, although an attribute is writeable this may be restricted to a certain user / user group.

Applies to

Package	Versions
Opc.UaFx.Advanced	v2.5–v2.59