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I understand that open graph should be embedded on the page like the following:
(as per this link: http://http://ogp.me/)
<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/images/rock.jpg" />
However, the above is invalid HTML5. HTML5 requires a name/content attributes. OG on the other hand uses the property/content attributes.
This problem has caused W3C to return validation errors on the site.
Is it correct to just use the "name" attribute in Metatag Open Graph module? I can submit a path for this and seems to work - w3c validates it okay. I'm not sure if this is okay with OG.