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HTML <html> xmlns Attribute

Last Updated : 12 Jul, 2025
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The HTML <html> xmlns Attribute is used to specify the XML namespace for a document. This attribute is mainly required in XHTML, not valid in HTML 4.01, and optional in HTML 5.

Syntax

<html xmlns="https://www.w3.org/1999/xhtml/">

Attribute Values

Value

Description

https://www.geeksforgeeks.org/

It defines the namespace to use (for XHTML documents).

Example:

html 
<!DOCTYPE html PUBLIC 
    "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.geekforgeeks.org//xhtml">
<head>
    <title>Title of the document</title>
</head>

<body style="text-align: center;">
    <h1>GeeksForGeeks</h1>
    
    <h2>HTML xmlns Attribute</h2>
    
    The content of the document......
</body>

</html>

Output:

Supported Browsers:

The browser supported by <HTML> xmlns attribute are listed below:

  • Apple Safari 1.0
  • Google Chrome 1.0
  • Firefox 1.0
  • Opera 1.0
  • Internet Explorer 6.0





M

manaschhabra2
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