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Re: Grails meta tags markup errors

From: Jukka K. Korpela <jkorpela@cs.tut.fi>
Date: Mon, 07 Jan 2013 11:52:12 +0200
Message-ID: <50EA9ACC.2000707@cs.tut.fi>
To: www-validator@w3.org
2013-01-05 14:02, Sascha Meissner wrote:

> Web-Applications using the Grails-Framework do applicate their templates
> with a syntax like:
>
> <meta name="layout" content="main_layout"/>
>
> wich is highlighted bei markupValidationService as an error because this
> meta tag may appear in the body as well as in the head section and
> "layout" is not a valid name for the meta-Element in HTML-5.
> Take a look at
> http://stackoverflow.com/questions/13062121/grails-meta-name-layout-w3c-html5-invalid-markup-validation

As explained in the approved answer there last October, you get the 
error message about missing itemprop when trying to use <meta> outside 
<head>. Somewhat strangely, the W3C Markup Validator seems to check 
against WHATWG documents, not the W3C HTML5 Candidate Recommendation - 
because the latter does not allow <meta> in <body> at all, whereas the 
former allows it if the "itemprop" attribute is present.

The answer also explains why "layout" is reported as an error and points 
to the WHATWG Wiki for proposing additions to allowed "name" attribute 
values.

> As Grails is an more often used Framework I would like you to think
> about adding this specification so that Grails-Users can also get a
> fullfilling green light from W3.

If desired, you can use such arguments when proposing an addition in 
WHATWG Wiki.

"Fullfilling green light" would still be illusionary. It does not make 
an attribute any better supported in relevant software to have it added 
to the WHATWG Wiki, and it does not make the framework any better - it 
would just hide the fact that the framework is using <meta> tags in a 
questionable manner.

Yucca
Received on Monday, 7 January 2013 09:52:43 GMT

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