tent="{{ page.editor }}" />{% endif %}
  {% if page.publication-date %}<meta property="dc:date" content="{{ page.publication-date }}" />{% endif %}
  {% if page.rights %}<meta property="dc:rights" content="{{ page.rights }}" />{% endif %}
  <meta property="dc:source" content="{% if page.source %}{{ page.source }}{% else %}{{ site.title }}{% endif %}" />

  <!-- Open Graph metadata -->
  <meta property="og:title" content="{{ page.title }}" />
  <meta property="og:url" content="{{ resource_url }}" />
  <meta 