The html5 transformation generates HTML5 output and a table of contents (TOC) file.

The HTML5 output is always associated with the default DITA-OT CSS file (commonltr.css or commonrtl.css for right-to-left languages). You can use toolkit parameters to add a custom style sheet that overrides the default styles, or generate a <nav> element with a navigation TOC in topic pages.

To run the HTML5 transformation, set the transtype parameter to html5, or pass the --format=html5 option to the dita command line.