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Re: X-UA-Compatible causes extraneous errors in the validator for an html5 page

From: Robert K. Foster <rkfoster@thewindjammer.com>
Date: Mon, 9 Apr 2012 12:40:41 -0400
Message-ID: <CAA0DoA4qLrQHcPiuMp3_CSSnhB7fqSbjqvd_GgPu4GGbDDxMMw@mail.gmail.com>
To: David Dorward <david@dorward.me.uk>
Cc: www-validator@w3.org

Thanks for pointing out the problem with the 'div' element. Many times I
just copy and paste code from services like facebook without thinking it
through. Removing the 'div' element from the head solved the problem.

I thought I had made it clear that I understood that particular meta tag is
not valid markup. But I am not aware of another way currently to make html5
compatible with older browsers. Is there another html5-valid way that you
are aware of?


On Sat, Apr 7, 2012 at 8:06 AM, David Dorward <david@dorward.me.uk> wrote:

> On 6 Apr 2012, at 23:44, Robert K. Foster wrote:
>  Line 8, Column 52: Bad value X-UA-Compatible for attribute http-equiv on
> element meta.
> <meta http-equiv="X-UA-Compatible" content="IE=9" />
> That is invalid HTML 5.
> From the spec: Conformance checkers must use the information given on the
> WHATWG Wiki PragmaExtensions page to establish if a value is allowed or
> not: values defined in this specification or listed on the aforementioned
> page must be accepted, whereas values not listed in either this
> specification or on the aforementioned page must be rejected as invalid.
> Conformance checkers may cache this information (e.g. for performance
> reasons or to avoid the use of unreliable network connectivity).
>   http://www.w3.org/TR/html5/the-meta-element.html#the-meta-element
> Frankly, having a W3C spec depend on a freely editable third party
> resource seems crazy to me. Hopefully it will be improved before HTML 5
> becomes a recommendation.
>  Line 45, Column 7: Stray end tag head.
>  Line 47, Column 6: An body start tag seen but an element of the same type
> was already open.
> You terminated the head (the end tag is optional) and started the body
> (the start tag is optional) by on line 33 by including a <div> (since div
> elements cannot appear in the head but can appear in the body).
> --
> David Dorward
> http://dorward.me.uk
Received on Monday, 9 April 2012 16:41:11 UTC

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