Recursive substitution

Hi,
 This problem is about how to create a recursive reference node and resolve it 
using XSL.

 My XML looks like this:

    <define name="DEF1">
        <reg name="REG1"/>
    </define>
    
    <define name="DEF2">
        <reg name="REG2"/>
        <ref name="DEF1"/>
    </define>
  
     <block name="block1">
          <reg name="REG3"/>
          <ref name="DEF2"/>
     </block>

  The output I need is : 

Register : REG3

Register : REG2

Register : REG1


But I don't get the last line. In other words, the "ref" call is not resovling 
recursively.
My XSL looks like this :  

-------
   <xsl:template match="/">
        <xsl:variable name="x">
            <xsl:apply-templates mode="pass1"/>
        </xsl:variable>
        <xsl:apply-templates mode="pass2" select="$x"/>
    </xsl:template>
    
    <xsl:template match="*" mode="pass1">
        <xsl:copy>
            <xsl:copy-of select="@*"/>
            <xsl:apply-templates mode="#current"/>
        </xsl:copy>
    </xsl:template>
    
    <xsl:template match="define" mode="pass1">
    </xsl:template>
    
    <xsl:template match="ref[(_at_)name]" mode="pass1">
        <xsl:variable name="x">
            <xsl:copy-of select="//define[(_at_)name=current()/@name]/*"/>
        </xsl:variable>
        <xsl:apply-templates select="$x" mode="#current"/>
    </xsl:template>
    
    
    <xsl:template match="reg" mode="pass2">
        <br/>Register : <xsl:value-of select="@name"/><br/>
    </xsl:template>

-------------------------------

A follow up question is, in this kind of multi-pass processing, is there a way 
to dump out the
results after a pass to aid debug?

Thanks,
Anupam.
 


                
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