## Node.NamespaceURI property

Returns the namespace URI of the element, or null if the element is not in a namespace.

```csharp
public virtual string NamespaceURI { get; }
```

### Property Value

A string representing the namespace URI of the element's qualified name.

## Remarks

Reference:

[DOM Standard](https://dom.spec.whatwg.org/#dom-element-namespaceuri).

### See Also

* class [Node](../)
* namespace [Aspose.Html.Dom](../../../aspose.html.dom/)
* assembly [Aspose.HTML](../../../)