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-LewisReceived on Sunday, 9 January 2011 09:20:20 UTC
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