Determines if the table of contents of the book is added to the related group at publishing time.
When used in HTML and as part of Author-it's Plain HTML table of contents, clicking the link displays the correct contents page expanded out to the correct branch. So if you come to a page through the search or index you can quickly find its context in the contents.
The Contents link will not be created in HTML Help, JavaHelp or Oracle Help for Java as the contents is already displayed as part of their native functionality.
The Contents element corresponds to the "Book contents" field, on the Special Links sub-tab, on the Related Topics tab, of the Topic object.