OpenGraph MODx

<meta property="og:title" content="[[*pagetitle]]"/>
<meta property="og:site_name" content="[[++site_name]]"/>
<meta property="og:url" content="[[++site_url]][[*uri]]"/>
<meta property="og:description" content="[[*content:notags:limit=`200`]]"/>
<meta property="og:image" content="[[++site_url]][[*tvname]]"/>
<meta name="twitter:card" content="summary" />
<meta name="twitter:title" content="[[*pagetitle]]" />
<meta name="twitter:image:src" content="[[++site_url]][[*tvname]]" />
<meta name="twitter:description" content="[[*content:notags:limit=`200`]]" />
<link rel="image_src" href="[[++site_url]][[*image]]" />

OpenGraph MODx modified version

<meta property="og:title" content="[[*pagetitle]]"/>
<meta property="og:site_name" content="[[++site_name]]"/>
<meta property="og:url" content="[[++site_url]][[*uri]]"/>
<meta property="og:description" content="[[*description:notags:limit=`200`]]"/>
<meta property="og:image" content="[[++site_url]][[*seo_img:phpthumbon=`w=537&h=240&zc=1`]]"/>
<meta name="twitter:card" content="summary" />
<meta name="twitter:title" content="[[*pagetitle]]" />
<meta name="twitter:image:src" content="[[++site_url]][[*seo_img]]" />
<meta name="twitter:description" content="[[*description:notags:limit=`200`]]" />
<link rel="image_src" href="[[++site_url]][[*image]]" />