This mode is to support “tag”, annotation in org-files or comments in
programming mode. A tags looks like a java annotation with § (primary)
or ¤ (secondary) instead of the @.
This emacs mode currently support highlighting and basic navigation
between these tags.

For more details refer to the the README.org file, and for examples of
what theses "tags", comments, you can look at the code source of the library.