No error for missing namespace attribute

Hello,
 
The document at http://www.savagecreek.net/CSS/t1.htm passes validation
although it is missing the mandatory html namespace attribute.
 
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.savagecreek.net%2FCSS
%2Ft1.htm
 
A validator defect?
 
Best wishes,
 
Melinda

  _____ 

HP  -   Melinda Grant
Connectivity Standards 
Consumer Printing and Imaging
+1 (541) 582-3681
melinda.grant@hp.com   
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