[%- # render one level of toc and call recursively itself if there are
   # nested levels.
   # expected args:
   # subs - an array with keys indentical to 'toc' from above.
-%]

        <ul class="toc">
[%- FOREACH sec = subs -%]

            <li>
                <a name="[%- sec.toc_link -%]"></a><a href="[%- sec.link -%]">[%- sec.title -%]</a>[%- IF sec.abstract -%]<br>[%- sec.abstract -%]<br><br>[%- END -%][%- IF sec.subs -%][%- PROCESS page_toc_section subs=sec.subs -%][%- END -%]
                
            </li>
[%- END -%]

        </ul>