[xsl] [xsl-fo] Select background image from xml file

[Colin DeClue <colin.declue@xxxxxxxxx>]

Hey guys,

I'm trying to have a background image over the entire page for a
report I'm doing, but I need to have the xml determine what the
background image should be. Is there an easy way I can do that?
Currently, I have:

<fo:simple-page-master master-name="first"
           page-width="8.5in"   page-height="11in"
           margin-top="0.13in"  margin-bottom="0.25in"
           margin-left="0.175in" margin-right="0.25in"
background-image="Bol2.png">

The Bol2.png part I want to be a uri I pass in.

Thanks,
Colin DeClue