[docbook-apps] how to add fo:block-container around title and subtitle on the titlepage

[Nancy Brandt]

Hi folks,
   
  I am trying to customize my_titlepage.xsl with the help of 
titlepage.templates.xml file which I will process with fo/titlepage.xsl.
   
  What I need to define in this XML file is a <fo:block-container> around the 
<title> and <subtitle> elements, like so:
   
  <fo:block-container>
   <title>
  <subtitle>
  </fo:block-container>
   
  The problem is that I don't know how to define the block-container in XML, so 
that after processing this XML file with fo/titlepage.xsl, the title and 
subtitle will be inside the 
  <fo:block-container> in the resulting my_titlepage.xsl.
   
  Example from titlepage.templates.xml:
   
  <t:titlepage-content t:side="recto"
             text-align="center">
 
    <!-- here I want the fo:block-container to start-->
    <title 
           t:named-template="component.title" 
           param:node="ancestor-or-self::article[1]" 
           font-size="&hsize5;" 
           font-weight="bold"
           keep-with-next="always" />

    <subtitle/>
 <!-- here I want the fo:block-container to end-->

        ...
  </t:titlepage-content>

   
  Please, advise!!!
   
  Thanks in advance!
  Nancy