Re: Can Open Graph Protocol be validated by W3C Markup Validation Service ?

On Sun, Jan 9, 2011 at 2:12 AM, Fred Marka <fredmarka@hotmail.com> wrote:
> In order to add use Facebook features I put some meta tags relative to Facebook (property, og) but when I try to validate my webpage http://www.agencearagon.com I go the following error:
>
> Line 23, Column 16: there is no attribute "property"
> <meta property="fb:admins" content="727013482" />
>
> I've seen that these meta belong to the Open Grap Protocol (http://ogp.me/).
>
> Does it mean that every page that intend to use Facebook features could not be validated ?

The processing of RDFa metadata like this is not standardized in text/html.

The RDFa WG and HTML WG are drafting an extension to HTML 4.01 standard
and to the draft of HTML5, called HTML+RDFa, in which RDFa such as this
metadata would be conforming.

http://dev.w3.org/html5/rdfa/

The W3C validator includes experimental HTML5 validation, but not experimental
HTML+RDFa validation.

--
Benjamin Hawkes-Lewis