How to display <revdescription> using dsssl stylesheets ?

[Peter Biechele <Peter.Biechele@bextec.de>]

I want to use the <revhistory> tag together with the <revdescription> tag to 
get multiple <para> paragraphs onto the second page of a docbook book.
But the DSSSL Stylesheets V1.78 do not display anything of the revdescription 
tag.

The docbook V4.2 code is e.g.
-----------------------
<book lang="de">
.....
<bookinfo>
    <revhistory>
      <revision>
	<revnumber>A</revnumber>
	<date>19.1.2004</date>
	<revdescription>aa
	  <para>Helloa</para>
	  <para>Hellob</para>
	</revdescription>
      </revision>

    </revhistory>
</bookinfo>

</book>
-----------------------

My dsl custom stylesheet has:
-------------------
;;; page after title page layout
(define (book-titlepage-verso-elements)
          (list (normalize "title")
                (normalize "subtitle")
                (normalize "corpauthor")
                (normalize "authorgroup")
                (normalize "author")
                (normalize "editor")

                (normalize "abstract")

                (normalize "edition")
                (normalize "pubdate")
                (normalize "copyright")
                (normalize "legalnotice")
                (normalize "revhistory")
                (normalize "isbn")
          )
)
--------------------------

Unfortunately I am a novice to DSSSL programming and do not understand the 
code in the print/dbbibl.dsl file to change to my needs. 
Can somebody help me with an explanation on how to get the full revdescription 
in my print document ??

Thank you very much !
Peter Biechele

#####################################################
Dr. Peter Biechele, E-Mail: Peter.Biechele@beXtec.de