Why is a Warning raised

From: Carl Moxey <carl.moxey@gmail.com>
Date: Sat, 9 Jul 2016 02:05:53 +0000
To: www-validator@w3.org
Message-ID: <CAFpHavaUXpBZDomeX7FszYGvk88rJxueeDhtjrOurYD0NJ8kmg@mail.gmail.com>

I believe this code to be correctly formed. Why is the validator raising a
warning?
Thank you.[image: Inline image 1]

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image/png attachment: Screen_Shot_2016-07-09_at_02.02.45_.png

Received on Tuesday, 12 July 2016 14:33:28 UTC