conref resolution best meets user expectations. Switching the order of
processing, while legal, may give different results. </li>
<li class="link ulchildlink"><span class="ulchildlinktext"><a href="../dev_ref/DITA-OTPreprocess.html">Pre-processing modules</a></span><br />
The pre-processing operation is a set of steps that typically runs at the beginning of
  every DITA-OT transformation. Each step or stage corresponds to an Ant target in the build
  pipeline; the preprocess target calls the entire set of s