When importing from HTML Help or RoboHelp™project files, any topics that are not contained in the TOC (.hhc file) but that are linked to from other topics, are imported as topics under a Non-TOC Topics placeholder.
This includes any Inline, Block, Popup or Text Popups contained in RoboHelp™project files. The Importer maps these links to Author-it Hypertext Link templates as follows: