{% if not PLUGINS or 'seo' not in PLUGINS %}
  {% if OG_LOCALE %}
    {% set default_locale = OG_LOCALE %}
  {% else %}
    {% set default_locale = "en_US" %}
  {% endif %}
  <meta property="og:site_name" content="{{ SITENAME }}" />
  <meta property="og:title" content="{{ article.title|striptags|escape }}" />
  <meta property="og:description"
        content="{{ article.summary|striptags|escape }}" />
  <meta property="og:locale"
        content="{{ article.metadata.get('og_locale', default_locale) }}" />
  <meta property="og:url" content="{{ SITEURL }}/{{ article.url }}" />
  <meta property="og:type" content="article" />
  <meta property="article:published_time" content="{{ article.date }}" />
  <meta property="article:modified_time" content="{{ article.modified }}" />
  <meta property="article:author"
        content="{{ SITEURL }}/{{ article.author.url }}">
  <meta property="article:section" content="{{ article.category.name }}" />
  {% for tag in article.tags %}<meta property="article:tag" content="{{ tag.name|escape }}" />{% endfor %}
  {% if 'cover' in article.metadata %}
    <meta property="og:image"
          content="{{ SITEURL }}/{{ article.metadata['cover'] }}">
  {% else %}
    <meta property="og:image" content="{{ SITELOGO }}">
  {% endif %}
{% endif %}