show.comments — Display remark elements?
<xsl:param name="show.comments" select="1"/>
If non-zero, comments will be displayed, otherwise they
are suppressed. Comments here refers to the remark element
(which was called comment prior to DocBook
4.0), not XML comments (<-- like this -->) which are
unavailable.
Dblatex uses the PDF Text Annotations capabilities to handle comments and remarks.