ref="/metadata/">Working with metadata</a>
      <a class="sidebar-nav-item {{ispage patterns/*}}active{{end}}" href="/patterns/">Pattern matching</a>
      <a class="sidebar-nav-item {{ispage create-trees/*}}active{{end}}" href="/create-trees/">Creating file trees from scratch</a>
      <a class="sidebar-nav-item {{ispage split-files/*}}active{{end}}" href="/split-files/">Splitting files</a>
      <a class="sidebar-nav-item {{ispage images/*}}active{{end}}" href="/images/">Example: Images</a>
    </nav>

 