DITA to HTML5
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 sheets to override the default styles.
To run the HTML5 transformation, set the transtype parameter to html5.