The Transition template contains variables and a special <X1> and </X1> tag pairs that delimit the part that is repeated for each item of the sub-table of contents. The top and bottom parts of the template are not repeated and contain no variable. The part that is delimited by the <X1> and </X1> tags contains the following variables:
Here is a simple transition template, the one used for this documentation:
<HR><H4>Table of Contents</H4><UL> <X2> <LI><A HREF="@FILEPATH@">@TITLE@</A></LI> </X2></UL>