src/third_party/web_platform_tests/conformance-checkers/html-rdfa/0310-novalid.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
 	<meta charset=utf-8>
 	<title>Test 0310</title>
   </head>
   <body>
 	<div prefix="ex: http://www.example.com/roles/" id="therole" role="ex:somerole someOtherRole http://www.example.com/alternate/role">
       <p>Some contents that are a header</p>
     </div>
   </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset=utf-8>
	<title>Test 0310</title>
	</head>
	<body>
	<div prefix="ex: http://www.example.com/roles/" id="therole" role="ex:somerole someOtherRole http://www.example.com/alternate/role">
	<p>Some contents that are a header</p>
	</div>
	</body>
	</html>