# IOpcNodeTypeInfo Interface

<span class="api-meta">since v2.20</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>Members</dt>
<dd><a href="./members">IOpcNodeTypeInfo Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Defines type declaration information used for node types.

## Syntax

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

```csharp
public interface IOpcNodeTypeInfo
```

</div>

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

```vbnet
Public Interface IOpcNodeTypeInfo
```

</div>

## Derived types

- [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/)
- [OpcObjectTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjecttypeinfo/)
- [OpcVariableTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcvariabletypeinfo/)

## Properties

| Name | Description |
|---|---|
| [BaseType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#basetype) | Gets the type from which the current IOpcNodeTypeInfo directly inherits. |
| [IsObject](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#isobject) | Gets a value indicating whether the type is an object node (see [Object](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodecategory/#object)). |
| [IsSystemType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#issystemtype) | Gets a value indicating whether the current IOpcNodeTypeInfo represents one of the predefined built-in node types defined by the OPC UA. |
| [IsVariable](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#isvariable) | Gets a value indicating whether the type is an object node (see [Variable](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodecategory/#variable)). |
| [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#name) | Gets a value which defines the non-localizable human-readable name of the type represented. |
| [TypeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#typeid) | Gets a value which identifies the type represented. |
| [UnderlyingType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#underlyingtype) | Gets the type which provides the implementation of the IOpcNodeTypeInfo. |

## Methods

| Name | Description |
|---|---|
| [GetMember](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#getmember) | Searches for the member with the specified `name`. |
| [GetMembers](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#getmembers) | Returns all the members of the current IOpcNodeTypeInfo. |
| [References](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnodetypeinfo/members#references)<span class="api-meta">since v2.50</span> | Retrieves a sequence of immutable references between this node type and other nodes. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.20–v2.59 |