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XmlAttribute.BaseURI Property

Gets the base Uniform Resource Identifier (URI) of the node.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)

public override string BaseURI { get; }

Property Value

Type: System.String
The location from which the node was loaded or String.Empty if the node has no base URI. Attribute nodes have the same base URI as their owner element. If an attribute node does not have an owner element, BaseURI returns String.Empty.

A networked XML document is comprised of chunks of data aggregated using various World Wide Web Consortium (W3C) standard inclusion mechanisms and therefore contains nodes that come from different places. The BaseURI tells you where these nodes came from.

For additional information on BaseURI and how it behaves with other node types, see XmlNode.BaseURI.

This property is a Microsoft extension to the Document Object Model (DOM).

The following example displays information on the attribute node, including its base URI.

using System;
using System.IO;
using System.Xml;

public class Sample
  public static void Main()
    //Create the XmlDocument.
    XmlDocument doc = new XmlDocument();

    //Display information on the attribute node. The value 
    //returned for BaseURI is 'http://localhost/baseuri.xml'.
    XmlAttribute attr = doc.DocumentElement.Attributes[0];
    Console.WriteLine("Name of the attribute:  {0}", attr.Name);
    Console.WriteLine("Base URI of the attribute:  {0}", attr.BaseURI);
    Console.WriteLine("The value of the attribute:  {0}", attr.InnerText);

#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;

int main()
    //Create the XmlDocument.
    XmlDocument* doc = new XmlDocument();

    //Display information on the attribute node. The value
    //returned for BaseURI is 'http://localhost/baseuri.xml'.
    XmlAttribute* attr = doc->DocumentElement->Attributes->ItemOf[0];
    Console::WriteLine(S"Name of the attribute:  {0}",attr->Name);
    Console::WriteLine(S"Base URI of the attribute:  {0}",attr->BaseURI);
    Console::WriteLine(S"The value of the attribute:  {0}",attr->InnerText);


The sample uses the file, baseuri.xml, as input.

<!-- XML fragment -->
<book genre="novel">
  <title>Pride And Prejudice</title>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0