Will meta-props support <meta property>?

[liamqma]

As you see, those og meta data all rely on property instead of content

<meta property="og:type" content="website">
<meta property="og:title" content="News.com.au">
<meta property="og:description" content="News Online from Australia and the World">
<meta property="og:url" content="http://www.news.com.au/">
<meta property="og:site_name" content="News.com.au">
<meta property="og:image" content="https://secure.gravatar.com/blavatar/99ae28ba58e6719abd9d8575bdc18a54?s=200&amp;ts=1486526113">
<meta property="og:image:width" content="200">