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HTML | <html> xmlns Attribute

  • Difficulty Level : Medium
  • Last Updated : 22 Apr, 2020

The HTML <html> xmlns Attribute is used to specify the xml namespace for a document.

Important Note: This attribute is mainly required in XHTML, not valid in HTML 4.01, and optional in HTML 5.


<html xmlns=""> 

Attribute Values:

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


    "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    <title>Title of the document</title>
<body style="text-align: center;">
    <h2>HTML xmlns Attribute</h2>
    The content of the document......


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
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