htmlhelp.only
htmlhelp.only — Should only project files be generated?
Synopsis
<xsl:param name="htmlhelp.only" select="0"></xsl:param>
Description
Set to non-zero if you want to play with various HTML Help parameters
and you don't need to regenerate all HTML files. This setting will not
process whole document, only project files (hhp, hhc, hhk,...) will be
generated.