The toc directive is supplied by the toc plugin.

Add a table of contents to a page:

[[!toc  ]]

The table of contents will be automatically generated based on the headers of the page. By default only the largest headers present on the page will be shown; to control how many levels of headers are shown, use the levels parameter:

[[!toc  levels=2]]

The toc directive will take the level of the first header as the topmost level, even if there are higher levels seen later in the file.

The table of contents will be created as an ordered list. If you want an unordered list instead, you can change the list-style in your local style sheet.