<head prefix="og: http://ogp.me/ns#; dc: http://purl.org/dc/terms/#">
  {% capture resource_url %}{{ site.url }}{{ site.baseurl }}{{ page.url }}{% endcapture %}
  {% capture directory_url %}{{ site.url }}{{ site.baseurl }}{% endcapture %}
  <!-- Canonical link to help search engines -->
  <link rel="canonical" href="{{ resource_url }}" />

  <!-- Basic meta elements -->
  <meta charset="utf-8" />

  <!-- Enable responsiveness on mobile devices -->
  <meta name="viewport" content="width=device-width,initial-