invisible footnote (in note) in qandaset when using FOP to generate a .pdf

I do not know if the following issue is a docbook or a FOP issue. 
But as a happy Docbook user, I start my search for a solution on this list.

The footnote content is lost (?) during the fo to pdf 
processing whenever I put a footnote in a qandaset.
Is this because of a wrong usage of docbook or a problem 
with my tool chain?

I use 

- 
docbook-xsl-1.73.2

- 
saxon6-5-5

- 
fop-0.93

 

Input: 

<?xml version="1.0" 
encoding="UTF-8"?>

<book version="5.0" 
xmlns="http://docbook.org/ns/docbook"

      
xmlns:xlink="http://www.w3.org/1999/xlink"

      
xmlns:xi="http://www.w3.org/2001/XInclude"

      
xmlns:svg="http://www.w3.org/2000/svg"

      
xmlns:mml="http://www.w3.org/1998/Math/MathML"

      
xmlns:html="http://www.w3.org/1999/xhtml"

      
xmlns:db="http://docbook.org/ns/docbook">

  <title>Test DocBook 
5.0</title>

  
<chapter>

    <title>Test 
Pdf</title>

    
<section>

      <title>invisible 
footnote in note in qandaset</title>

      
<qandaset>

        
<qandadiv>

          
<qandaentry>

            
<question>

              
<para>Question</para>

            
</question>

            
<answer>

              
<para>Answer</para>

              <note>

                <para>Note 
with a footnote<footnote>

                    <para>This 
is the 'invisible' footnote.</para>

                  
</footnote></para>

              
</note>

            
</answer>

          
</qandaentry>

        
</qandadiv>

      
</qandaset>

    
</section>

  
</chapter>

</book>

 

 

Using:

java 
com.icl.saxon.StyleSheet -o test.fo test.xml 
docbook.xsl

fop  test.fo
 
test.pdf

 

Generates 
the outputs: .fo and .pdf 

 

…

<fo:block 
space-before.optimum="1em" space-before.minimum="0.8em" 
space-before.maximum="1.2em">Note with a 
footnote<fo:footnote><fo:inline><fo:inline font-size="75%" 
font-weight="normal" font-style="normal" 
baseline-shift="super">1</fo:inline></fo:inline><fo:footnote-body 
font-family="serif,Symbol,ZapfDingbats" font-size="8pt" font-weight="normal" 
font-style="normal" text-align="justify" start-indent="0pt" 
text-indent="0pt">

                    
<fo:block><fo:inline font-size="75%" font-weight="normal" 
font-style="normal" baseline-shift="super">1</fo:inline>This is the 
'invisible' footnote.</fo:block>

                  
</fo:footnote-body></fo:footnote></fo:block>

…

…

Note

Note with a footnote1

 

…

 

But the footnote content: "This is 
the 'invisible' footnote." is lost during the fo to pdf 
processing

 

Any hints about what I should do?

 

Thanks,

 

Paul