# OpcNodeIdType Enum

> Reference: Defines the type of an OpcNodeId including its type, format and its scope.

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Defines the type of an [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) including its type, format and its scope.

## Syntax

<div class="api-signature" data-lang="csharp">

```csharp
public enum OpcNodeIdType
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Enum OpcNodeIdType
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [ValueType](https://learn.microsoft.com/dotnet/api/system.valuetype) → [Enum](https://learn.microsoft.com/dotnet/api/system.enum) → **OpcNodeIdType**

## Fields

| Name | Value | Description |
|---|---|---|
| <a id="guid"></a>`Guid` | `2` | The identifier value is a [Guid](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidtype/#guid) consisting of 16 bytes while an identifier with 16 bytes where each byte is equals zero indicates a null identifier. |
| <a id="numeric"></a>`Numeric` | `0` | The identifier value is numeric while an identifier equals zero indicates a null identifier. |
| <a id="opaque"></a>`Opaque` | `3` | The identifier value is an array of bytes while an identifier with a zero length array indicates a null identifier. |
| <a id="string"></a>`String` | `1` | The identifier value is a string while an identifier equals an empty string indicates a null identifier. |

## Applies to

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