Joomla! Documentation™

Regarding <jdoc:include type="modules" ... />

It should be explained that the name attribute will take the value from the type column in the module manager list by cutting off from the start the letters "mod_" and that one must also give the title attribute a value - otherwise rendered content will be empty.

So, let's say I have three menu modules of type "mod_mainmenu" with the following titles: "Menu One", "Menu Two", "Menu Three". I would need these elements in the template file to get their contents:

<jdoc:include type="modules" name="mainmenu" title="Menu One" />
<jdoc:include type="modules" name="mainmenu" title="Menu Two" />
<jdoc:include type="modules" name="mainmenu" title="Menu Three" />