On Apr 22, 2010, at 12:28 PM, Philippe Le Hegaret wrote: > Facebook announced yesterday support for the open graph protocol > [1]. It > allows website to integrate themselves into the facebook social graph. > They already have several partners that are going to deploy that with > them. > > Their system is based on RDFa, and thus using xmlns attributes: > [[ > <html xmlns:og="http://opengraphprotocol.org/schema/" > xmlns:fb="http://developers.facebook.com/schema/"> > <head> > <title>The Rock (1996)</title> > <meta property="og:title" content="The Rock" /> > <meta property="og:type" content="movie" /> > <meta property="og:url" > content="http://www.imdb.com/title/tt0117500/ "/> > <meta property="og:image" > content="http://ia.media-imdb.com/rock.jpg" /> > ]] > > They're using XHTML 1.0 with the media type text/html. I don't think > they're going to switch to application/xhtml+xml soon. > > Effectively, from a technical perspective, it's a great news for the > RDFa community. But, from the point of HTML, Facebook and their > partners > are deploying xmlns attributes in HTML all over the Web, independently > of what the HTML5 specification is currently saying. So, that makes me > wonder how relevant the HTML5 resolution on ISSUE-41 is going to be, If their use of xmlns attributes is limited to RDFa, and they don't use any namespaced elements or attributes other than xmlns:, then I think their use is covered by the HTML+RDFa specification: http://www.w3.org/TR/rdfa-in-html/ Regards, MaciejReceived on Thursday, 22 April 2010 19:31:52 GMT
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