The htmlhelp transformation generates HTML output, CSS files, and the control files that are needed to produce a Microsoft HTML Help file.

In addition to the HTML output and CSS files, this transformation returns the following files, where mapname is the name of the master DITA map.
File name Description
mapname.hhc Table of contents
mapname.hhk Sorted index
mapname.hhp HTML Help project file
mapname.chm Compiled HTML Help
Note: This file is generated only if the HTML Help Workshop is installed on the build system.