I think I just figured it out:
<fo:basic-link  color="blue">
        <xsl:attribute name="external-destination">
         <xsl:text>uri("</xsl:text>
         <xsl:value-of select="Heading/@file"/>
          <xsl:text>")</xsl:text>
           </xsl:attribute>
           <xsl:value-of select="Heading"/>
 </fo:basic-link>
I think this works because uri("...") is not actually a function.
Mark
--------------------------------------------------
From: "Mark Wilson" <mark(_at_)knihtisk(_dot_)org>
Sent: Tuesday, November 10, 2009 7:12 PM
To: <xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com>
Subject: [xsl] fo basic link question
Every example for building a uri("...") I can find always fills the 
parentheses with a quoted string, like uri("s.pdf"). I want to use the 
value of an attribute:
<fo:basic-link external-destination="url(Heading/@file)" color="blue">
Can I do that? If so, how?
Thanks,
Mark
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