xternal Python
modules, you can define arbitrarily nestable tags right in your
templates.</p>
<p>To achieve this, the target def is invoked using the form
<code class="docutils literal notranslate"><span class="pre">&lt;%namespacename:defname&gt;</span></code> instead of the normal <code class="docutils literal notranslate"><span class="pre">${}</span></code>
syntax. This syntax, introduced in Mako 0.2.3, is functionally
equivalent to another tag known as <code class="docutils literal notranslate"><span cla