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Home/ Questions/Q 9206861
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Editorial Team
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Editorial Team
Asked: June 18, 20262026-06-18T00:15:53+00:00 2026-06-18T00:15:53+00:00

When writing a html 5 doctype, are you supposed to include the <html xmlns="http://www.w3.org/1999/xhtml">

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When writing a html 5 doctype, are you supposed to include the <html xmlns="http://www.w3.org/1999/xhtml"> as you did when previously using HTML4 doctype or should a different xhtml be used?

<!DOCTYPE html> 
<html xmlns="http://www.w3.org/1999/xhtml">
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  1. Editorial Team
    Editorial Team
    2026-06-18T00:15:54+00:00Added an answer on June 18, 2026 at 12:15 am

    No, you don’t need to include it. This should be enough.

     <!doctype html>
     <html> 
    
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