HTML5 Validator with RDFa 1.1 Support?

Dear all:

The popular HTML validator https://validator.nu/ seems to regard the @content attribute as invalid for any other HTML element than meta.

The W3C validator does not flag this as an error.

Does anybody have a clue why https://validator.nu/ does not suport HTML5+RDFa1.1?

Martin 
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martin hepp  http://www.heppnetz.de
mhepp@computer.org          @mfhepp

Received on Thursday, 12 May 2016 16:28:18 UTC