dynamic table hading XSL-FO

  Hello,
  I have a table that spans over many pages and table heading gets printed
on top of a new page.
  I need to change the column headings on the fly... what would be the good
approach?
  For example,

  I would do

  Date     USD         Name
  ------------------------
  
  for any tags that have <USDOLLAR>   ......  </USDOLLAR>

  and 

  Date      EUR          Name
  ------------------------

  for any tags that have <EURO>   ......  </EURO>

  My xml is already sorted by its currency types.

  I guess I can define two fo:table , but then, I wouln't want to print the
heading unless there are some rows that belong to it....

  Thanks much.

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