Meta tag twitter:domain not recognized

[Ruben van Doorn]

When checking URL younique-xperience.nl the following error is shown:

 

Line 68, Column 59: Bad value twitter:domain for attribute name on element meta: Keyword twitter:domain is not registered.

        <meta name="twitter:domain" content="Younique Xperience"/>

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.

 

 

The meta keyword twitter:domain is valid (listed and approved in WHATWG wiki), but not recognized by the W3C Validator yet. Please fix.

 

Best regards,

Ruben van Doorn

 

[Michael[tm] Smith]

Ruben van Doorn <[hidden email]>, 2013-10-16 11:09 +0200:

> When checking URL younique-xperience.nl the following error is shown:
>
> Line 68, Column 59: Bad value twitter:domain for attribute name on element
> meta: Keyword twitter:domain is not registered.
>
>         <meta name="twitter:domain" content="Younique Xperience"/>
>
> Syntax of metadata name:
>
> A metadata name listed in the HTML specification
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#
> standard-metadata-names>  or listed in the WHATWG wiki
> <http://wiki.whatwg.org/wiki/MetaExtensions> . You can register metadata
> names on the WHATWG wiki <http://wiki.whatwg.org/wiki/MetaExtensions>
> yourself.
>
> The meta keyword twitter:domain is valid (listed and approved in WHATWG
> wiki), but not recognized by the W3C Validator yet. Please fix.

The entry at http://wiki.whatwg.org/wiki/MetaExtensions for twitter:domain
links to https://dev.twitter.com/docs/cards but that page doesn't say
anything about twitter:domain, or does the "Cards Markup Tag Reference"
page at https://dev.twitter.com/docs/cards/markup-reference

If you can point me to actual user documentation from Twitter on what
twitter:domain means, I'd be happy to add validator support for it.

  --Mike

--
Michael[tm] Smith http://people.w3.org/mike