If set to true, the initial sort order is ascending,
if set to false, the initial sort order is descending</li>
</ul>
<p>Here is an example where the books are sorted by their author in an descending
order:</p>
<div class="highlight-yaml"><div class="highlight"><pre><span></span><span class="l l-Scalar l-Scalar-Plain">book</span><span class="p p-Indicator">:</span>
    <span class="l l-Scalar l-Scalar-Plain">label</span><span class="p p-Indicator">:</span> <span class="l l-Scalar l-Scalar-Plain">Book</span>