e_to_xmlschema }}">
  <meta property="article:author" content="https://www.facebook.com/{{ site.author.facebook }}"> {% for post in site.related_posts limit:3 %}
  <meta property="og:see_also" content="{{ post.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}"> {% endfor %} {% endif %} {% if page.categories %} {% for category in page.categories limit:1 %}
  <meta property="article:section" content="{{ category }}"> {% endfor %} {% endif %} {% if page.tags %} {% for tag in page.tag