HTML | <html> xmlns Attribute
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. Syntax: <html xmlns="http://www.w3.org/1999/xhtml"> Attribute Values: https://www.geeksforgeeks