HTML5 processing After the HTML5 files are generated, the transformation generates a table of contents (ToC) file called index.html, which can be loaded as a cover page or rendered in a navigation sidebar or menu via CSS. HTMLHTML5 HTML5CSSnav-toc targetsHTML5 nav-toc CSSHTML5 entry fileHTML5

As of DITA-OT 2.2, the nav-toc parameter can be used in HTML5 transformations to embed navigation directly in topics using native HTML5 elements without JavaScript or framesets.