# OpcVariableTypes Members > Reference: Provides the identifiers of the variable types defined by the OPC UA namespace.

Type: OpcVariableTypes
Namespace: Opc.UaFx
Assembly: Opc.UaFx.Advanced.dll
Package: Opc.UaFx.Advanced v2.59.0
Also in: Opc.UaFx.Client

## Fields ### AnalogItemId static Identifies the AnalogItemType variable type.

```csharp public static readonly OpcNodeId AnalogItemId ```

```vbnet Public Shared ReadOnly AnalogItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### AnalogUnitId static · since v2.50 Identifies the AnalogUnitType variable type.

```csharp public static readonly OpcNodeId AnalogUnitId ```

```vbnet Public Shared ReadOnly AnalogUnitId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### AnalogUnitRangeId static · since v2.50 Identifies the AnalogUnitRangeType variable type.

```csharp public static readonly OpcNodeId AnalogUnitRangeId ```

```vbnet Public Shared ReadOnly AnalogUnitRangeId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ArrayItemId static Identifies the ArrayItemType variable type.

```csharp public static readonly OpcNodeId ArrayItemId ```

```vbnet Public Shared ReadOnly ArrayItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### BaseDataVariableId static Identifies the BaseDataVariableType variable type.

```csharp public static readonly OpcNodeId BaseDataVariableId ```

```vbnet Public Shared ReadOnly BaseDataVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### BaseVariableId static Identifies the BaseVariableType variable type.

```csharp public static readonly OpcNodeId BaseVariableId ```

```vbnet Public Shared ReadOnly BaseVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### BuildInfoId static Identifies the BuildInfoType variable type.

```csharp public static readonly OpcNodeId BuildInfoId ```

```vbnet Public Shared ReadOnly BuildInfoId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ConditionVariableId static Identifies the ConditionVariableType variable type.

```csharp public static readonly OpcNodeId ConditionVariableId ```

```vbnet Public Shared ReadOnly ConditionVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### CubeItemId static Identifies the CubeItemType variable type.

```csharp public static readonly OpcNodeId CubeItemId ```

```vbnet Public Shared ReadOnly CubeItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### DataItemTypeId static Identifies the DataItemType variable type.

```csharp public static readonly OpcNodeId DataItemTypeId ```

```vbnet Public Shared ReadOnly DataItemTypeId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### DataTypeDescriptionId static Identifies the DataTypeDescriptionType variable type.

```csharp public static readonly OpcNodeId DataTypeDescriptionId ```

```vbnet Public Shared ReadOnly DataTypeDescriptionId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### DataTypeDictionaryId static Identifies the DataTypeDictionaryType variable type.

```csharp public static readonly OpcNodeId DataTypeDictionaryId ```

```vbnet Public Shared ReadOnly DataTypeDictionaryId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### DiscreteItemId static Identifies the DiscreteItemType variable type.

```csharp public static readonly OpcNodeId DiscreteItemId ```

```vbnet Public Shared ReadOnly DiscreteItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### FiniteStateVariableId static Identifies the FiniteStateVariableType variable type.

```csharp public static readonly OpcNodeId FiniteStateVariableId ```

```vbnet Public Shared ReadOnly FiniteStateVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### FiniteTransitionVariableId static Identifies the FiniteTransitionVariableType variable type.

```csharp public static readonly OpcNodeId FiniteTransitionVariableId ```

```vbnet Public Shared ReadOnly FiniteTransitionVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ImageItemId static Identifies the ImageItemType variable type.

```csharp public static readonly OpcNodeId ImageItemId ```

```vbnet Public Shared ReadOnly ImageItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### MultiStateDiscreteId static Identifies the MultiStateDiscreteType variable type.

```csharp public static readonly OpcNodeId MultiStateDiscreteId ```

```vbnet Public Shared ReadOnly MultiStateDiscreteId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### MultiStateValueDiscreteId static Identifies the MultiStateValueDiscreteType variable type.

```csharp public static readonly OpcNodeId MultiStateValueDiscreteId ```

```vbnet Public Shared ReadOnly MultiStateValueDiscreteId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### NDimensionArrayItemId static Identifies the NDimensionArrayItemType variable type.

```csharp public static readonly OpcNodeId NDimensionArrayItemId ```

```vbnet Public Shared ReadOnly NDimensionArrayItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### OptionSetId static Identifies the OptionSetType variable type.

```csharp public static readonly OpcNodeId OptionSetId ```

```vbnet Public Shared ReadOnly OptionSetId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ProgramDiagnosticId static Identifies the ProgramDiagnosticType variable type.

```csharp public static readonly OpcNodeId ProgramDiagnosticId ```

```vbnet Public Shared ReadOnly ProgramDiagnosticId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### PropertyId static Identifies the PropertyType variable type.

```csharp public static readonly OpcNodeId PropertyId ```

```vbnet Public Shared ReadOnly PropertyId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SamplingIntervalDiagnosticsArrayId static Identifies the SamplingIntervalDiagnosticsArrayType variable type.

```csharp public static readonly OpcNodeId SamplingIntervalDiagnosticsArrayId ```

```vbnet Public Shared ReadOnly SamplingIntervalDiagnosticsArrayId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SamplingIntervalDiagnosticsId static Identifies the SamplingIntervalDiagnosticsType variable type.

```csharp public static readonly OpcNodeId SamplingIntervalDiagnosticsId ```

```vbnet Public Shared ReadOnly SamplingIntervalDiagnosticsId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ServerDiagnosticsSummaryId static Identifies the ServerDiagnosticsSummaryType variable type.

```csharp public static readonly OpcNodeId ServerDiagnosticsSummaryId ```

```vbnet Public Shared ReadOnly ServerDiagnosticsSummaryId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ServerStatusId static Identifies the ServerStatusType variable type.

```csharp public static readonly OpcNodeId ServerStatusId ```

```vbnet Public Shared ReadOnly ServerStatusId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### ServerVendorCapabilityId static Identifies the ServerVendorCapabilityType variable type.

```csharp public static readonly OpcNodeId ServerVendorCapabilityId ```

```vbnet Public Shared ReadOnly ServerVendorCapabilityId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SessionDiagnosticsArrayId static Identifies the ServerVendorCapabilityType variable type.

```csharp public static readonly OpcNodeId SessionDiagnosticsArrayId ```

```vbnet Public Shared ReadOnly SessionDiagnosticsArrayId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SessionDiagnosticsVariableId static Identifies the SessionDiagnosticsVariableType variable type.

```csharp public static readonly OpcNodeId SessionDiagnosticsVariableId ```

```vbnet Public Shared ReadOnly SessionDiagnosticsVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SessionSecurityDiagnosticsArrayId static Identifies the SessionSecurityDiagnosticsArrayType variable type.

```csharp public static readonly OpcNodeId SessionSecurityDiagnosticsArrayId ```

```vbnet Public Shared ReadOnly SessionSecurityDiagnosticsArrayId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SessionSecurityDiagnosticsId static Identifies the SessionSecurityDiagnosticsType variable type.

```csharp public static readonly OpcNodeId SessionSecurityDiagnosticsId ```

```vbnet Public Shared ReadOnly SessionSecurityDiagnosticsId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### StateVariableId static Identifies the StateVariableType variable type.

```csharp public static readonly OpcNodeId StateVariableId ```

```vbnet Public Shared ReadOnly StateVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SubscriptionDiagnosticsArrayId static Identifies the SubscriptionDiagnosticsArrayType variable type.

```csharp public static readonly OpcNodeId SubscriptionDiagnosticsArrayId ```

```vbnet Public Shared ReadOnly SubscriptionDiagnosticsArrayId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### SubscriptionDiagnosticsId static Identifies the SubscriptionDiagnosticsType variable type.

```csharp public static readonly OpcNodeId SubscriptionDiagnosticsId ```

```vbnet Public Shared ReadOnly SubscriptionDiagnosticsId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### TransitionVariableId static Identifies the TransitionVariableType variable type.

```csharp public static readonly OpcNodeId TransitionVariableId ```

```vbnet Public Shared ReadOnly TransitionVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### TwoStateDiscreteId static Identifies the TwoStateDiscreteType variable type.

```csharp public static readonly OpcNodeId TwoStateDiscreteId ```

```vbnet Public Shared ReadOnly TwoStateDiscreteId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### TwoStateVariableId static Identifies the TwoStateVariableType variable type.

```csharp public static readonly OpcNodeId TwoStateVariableId ```

```vbnet Public Shared ReadOnly TwoStateVariableId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### XYArrayItemId static Identifies the XYArrayItemType variable type.

```csharp public static readonly OpcNodeId XYArrayItemId ```

```vbnet Public Shared ReadOnly XYArrayItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ### YArrayItemId static Identifies the YArrayItemType variable type.

```csharp public static readonly OpcNodeId YArrayItemId ```

```vbnet Public Shared ReadOnly YArrayItemId As OpcNodeId ```

**Field value** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) ## Methods ### GetNodeId static Determines the identifier of the variable type represented by the `type` specified.

```csharp public static OpcNodeId GetNodeId(OpcVariableType type) ```

```vbnet Public Shared Function GetNodeId(type As OpcVariableType) As OpcNodeId ```

**Parameters** | Name | Type | Description | |---|---|---| | `type` | [OpcVariableType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcvariabletype/) | The variable type whose identifier is to be determined. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) The identifier of the variable type. **Exceptions** | Exception | Condition | |---|---| | [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The `type` is not one of the members defined by the [OpcVariableType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcvariabletype/) enumeration. |