Django template pits a

      <ul class="sidebar-menu" data-widget="tree">
        <li class="header">导航栏</li>
        <!-- Optionally, you can add icons to the links -->
{#        <li><a href="/cmdb/dashboard"><i class="fa fa-dashboard"></i> <span>仪表盘</span></a></li>#}
        <li><a href="{% url 'cmdb:dashboard' %}"><i class="fa fa-dashboard"></i> <span>仪表盘</span></a></li>
        <li><a href="{% url 'cmdb:index' %}"><i class="fa fa-table"></i> <span>资产总表</span></a></li>
      </ul>

When I use "{% url 'cmdb: dashboard'%}", I want to use an alias name defined in the corresponding url in urls, and why? Provisions?