For very large job definitions, it is helpful to document parts of the file with comments.
Comments always start with <!-- and end with -->. In between may lie a few comments, but also entire program sections.
<!--This is a comment line -->
<jobdefinition name="'testJob_' + trigger.fileName" model="C:Users\public\EPLAN\base.eox " xmlns:xi="http://www.w3.org/2001/XInclude">
<actions>
<action name="Engineering.ImportIMXCommand" arguments="List{'project.imx'}" />
<action name="T_Ecad_Ui.UpdateExtensions" arguments=" absRef('Feeder.Mechatronic')"/>
<!--The next action is disabled by comment
<action name="Engineering.ImportIMXCommand" arguments="List{'project2.imx'}" />
-->
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="includedJobDef.xml"/>
</actions>
</jobdefinition>