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ISSUE-41: Facebook open graph protocol

From: Philippe Le Hegaret <plh@w3.org>
Date: Thu, 22 Apr 2010 15:28:20 -0400
To: public-html@w3.org
Message-Id: <1271964500.9926.75.camel@chacal>
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,

Philippe
[1]  http://developers.facebook.com/docs/opengraph
Received on Thursday, 22 April 2010 19:28:28 GMT

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