[xsl] XSL:FO - how to render a single footnote for multiple, identical f

Hi,
 
Is there a way to output a single footnote for multiple, identical XML
footnote entries in pdf?
 
For example, a document that has 2 identical footnotes:
 
foo <footnote notetext="footnote text" opid="fn1"/>
bar <footnote notetext="footnote text" opid="fn1"/>
 
outputs:
 
foo1
foo2
------------
1. footnote text
2. footnote text
 
instead of:
 
foo1
bar1
-------------
1. footnote text
 
I created an XML element that cross-references an existing, identical
footnote.
 
<xref toFootnote="yes id="fn1"/>
 
I want to write an XSL stylesheet that processes the xreftoFootnote
element by outputting the footnote number of the referenced footnote.  I
have the ID of the referenced footnote but can think of no way to access
the footnote number. Is there a way to save the footnote IDs and
footnote numbers in memory so that the xreftoFootnote template could
retrieve the footnote number for a particular ID?
 
Thanks for any suggestions on solving this problem.
 
Ann Marie
 
 

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