title: How to insert metadata in Sphinx?
body: <p>I want to insert some metadata (i.e. keywords, description, author) inside my web pages created by Sphinx.</p>
  <p>I found</p>
  <pre class="lang-none prettyprint-override"><code>:fieldname: Field content
  </code></pre>
  <p>in the documentation of Sphinx, but I have no idea how to use it.</p>