The top level entries of the table of contents are defined by a root tag. The subentries under each of those entries are tagged with the title of the entry. Entries can be ordered using the `list` field as described in TiddlerTags. The text for each entry is taken from the ''caption'' field if it is present, otherwise the ''title'' is used.
* `<<toc-selective-expandable>>` produces an expandable tree of links where the expand/contract buttons are only shown for entries that possess child nodes