# OpcDeleteHistoryOptions Enum

> Reference: Specifies the values an IOpcNodeHistoryProvider deletes when the history of a node is deleted within a time range.

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

Specifies the values an [IOpcNodeHistoryProvider](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.iopcnodehistoryprovider/) deletes when the history of a node is deleted within a time range.

## Syntax

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

```csharp
public enum OpcDeleteHistoryOptions
```

</div>

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

```vbnet
<Flags>
Public Enum OpcDeleteHistoryOptions
```

</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) → **OpcDeleteHistoryOptions**

## Fields

| Name | Value | Description |
|---|---|---|
| <a id="modified"></a>`Modified` | `1` | The modified values of the history instead of its values, as requested by a client which deletes the modified values of a node. |
| <a id="none"></a>`None` | `0` | The values of the history. |

## Applies to

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