# OpcDataTypeDeclarations Enum

<span class="api-meta">since v2.26</span>

<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 ways a data type is declared.

## Syntax

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

```csharp
public enum OpcDataTypeDeclarations
```

</div>

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

```vbnet
<Flags>
Public Enum OpcDataTypeDeclarations
```

</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) → **OpcDataTypeDeclarations**

## Fields

| Name | Value | Description |
|---|---|---|
| <a id="definition"></a>`Definition` | `2` | The data type is declared using a data type definition as defined in OPC UA v1.04. |
| <a id="description"></a>`Description` | `1` | The data type is declared using a data type description as defined in OPC UA v1.03. |
| <a id="inline"></a>`Inline` | `0` | The data type is not declared using a specific type declaration. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.26–v2.59 |