Error with registered keyword apple-itunes-app from Александр Богданов on 2013-03-02 (www-validator@w3.org from March 2013)

From: Александр Богданов <filtraciya@gmail.com>
Date: Sat, 2 Mar 2013 20:57:16 +0400
To: www-validator@w3.org
Message-ID: <CAJE2UPXci4n57sESAHPR3apRAAA0A+czSPAF+JKko0AOn8Tt9Q@mail.gmail.com>

Hello! I'm trying to validate site http://molodejj.tv

The first error is:

Bad value apple-itunes-app for attribute name on element meta: Keyword
apple-itunes-app is not registered.
<meta name="apple-itunes-app" content="app-id=443418022" />
Syntax of metadata name:
A metadata name listed in the HTML specification or listed in the WHATWG
wiki. You can register metadata names on the WHATWG wiki yourself.

But keyword apple-itunes-app was registered in WHATWG wiki in 30 November
2012! So, why validator told me this is error?

Received on Saturday, 2 March 2013 21:45:58 UTC