flex/templates/partial/jsonld_article.html

{% if not PLUGINS or 'seo' not in PLUGINS %}
  {% if SITELOGO %}
    {% set default_cover = SITELOGO %}
  {% else %}
    {% set default_cover = '{{ SITEURL }}/{{ THEME_STATIC_DIR }}/img/profile.png' %}
  {% endif %}
  <script type="application/ld+json">
  {
    "@context": "http://schema.org",
    "@type": "BlogPosting",
    "name": "{{ article.title|striptags }}",
    "headline": "{{ article.title|striptags }}",
    "datePublished": "{{ article.date }}",
    "dateModified": "{{ article.modified }}",
    "author": {
      "@type": "Person",
      "name": "{{ article.author.name }}",
      "url": "{{ SITEURL }}/{{ article.author.url }}"
    },
    "image": "{{ article.metadata.get('cover', default_cover) }}",
    "url": "{{ SITEURL }}/{{ article.url }}",
    "description": "{{ article.summary|striptags }}"
  }
  </script>
{% endif %}