Using key and position()

Hi,
I have an input XML like this:

<action>
	- <ParentGroup> Node1 </ParentGroup>
	- <ChildGroup> Node1.1 </ChildGroup>
	- <Child Node1>1.1.1 </Child Node1>
	- <Child Node2>1.1.2 </Child Node2>
	- <ParentGroup> Node1 </ParentGroup>
	- <ChildGroup> Node1.2 </ChildGroup>
	- <Child Node1>1.2.1 </Child Node1>
	- <Child Node2>1.2.2 </Child Node2>
	- <ParentGroup> Node1 </ParentGroup>
	- <ChildGroup> Node1.3 </ChildGroup>
	- <Child Node1>1.3.1 </Child Node1>
	- <Child Node2>1.3.2 </Child Node2>
	- <ParentGroup> Node1 </ParentGroup>
	- <ChildGroup> Node1.3 </ChildGroup>
	- <Child Node1>1.3.x </Child Node1>
	- <Child Node2>1.3.y </Child Node2>

	- <ParentGroup> Node2 </ParentGroup>
	- <ChildGroup> Node2.1 </ChildGroup>
	- <Child Node1>2.1.1 </Child Node1>
	- <Child Node2>2.1.2 </Child Node2>
	- <ParentGroup> Node2 </ParentGroup>
	- <ChildGroup> Node2.2 </ChildGroup>
	- <Child Node1>2.2.1 </Child Node1>
	- <Child Node2>2.2.2 </Child Node2>
	- <ParentGroup> Node2 </ParentGroup>
	- <ChildGroup> Node2.3 </ChildGroup>
	- <Child Node1>2.3.1 </Child Node1>
	- <Child Node2>2.3.2 </Child Node2>
...........
</action>

I want to capture the position of each of the
<ParentGroup> elements and store it in a variable by
going through the document only once. 

<xsl:variable name="parentGroup">
  <xsl:for-each select="ParentGroup">
    <parentgroup id="generate-id()" pos="position()"/>
  </xsl:for-each>
</xsl:variable>


Then I want to use this variable to get the position
of each <ParentGroup> and find its coresponding
<ChildGroup> and <Child Nodes>.

When I print the contents of the variable(@id and
@pos), then I find that the content is correct, but
when I try to retreive the content using key then I
get nothing.  Here is the XSL that I have.


<?xml version="1.0" ?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">

<!-- Key to group distinct ChildGroup's -->
<xsl:key name="SEC_CUST" match="ChildGroup" use="."/>

<!-- Key to group distinct ParentGroup's -->
<xsl:key name="PRI_CUST" match="ParentGroup" use="."/>

<!-- Key to find position of ParentGroup's -->
<xsl:key name="parentGroups" match="parentGroup"
use="@id"/>

<xsl:template match="/">
	<xsl:apply-templates/>
</xsl:template>


<xsl:template match="action">
<TRANS_OUTPUT>
<CUSTOMERS>
<xsl:variable name="var_24" select="Child Node1" />
<xsl:variable name="var_27" select="Child Node2" />

<!-- Variable to store the posittion of each
ParentGroup nodes -->
<xsl:variable name="parentGroup"> 
  <xsl:for-each select="ParentGroup">
    <parentgroup>
    <xsl:attribute name="id" select="generate-id()"/>
    <xsl:attribute name="pos" select="position()"/>
    </parentgroup>
  </xsl:for-each>
</xsl:variable>

  <xsl:for-each select="$var_21[count(. |
key('PRI_CUST', .)[1]) = 1]">
  <PRIMARY CUSTOMER>
     <xsl:variable name="priId" select="." />
     <xsl:variable name="p"
select="key('parentGroups', generate-id())/@pos" />
     <PRI_HEADER><xsl:value-of select="$p"/>
          <xsl:value-of select="$var_27[$p]"/>
     </PBU_HEADER>
     <PRIMARY_CUST_DESC>
        <xsl:value-of select="$var_24[$p]"/>
        <xsl:text> </xsl:text>
        <xsl:value-of select="$priId"/>
     </PRIMARY_CUST_DESC>

     <SECONDARY CUSTOMER> 
      <xsl:for-each select= SECONDARY CUSTOMER....
      ....group &.Do processing for Sec customers
     </SECONDARY CUSTOMER> 

    </End of for loop for Primary cusotmer>
    </PRIMARY CUSTOMER>
</CUSTOMERS>
</TRANS_OUTPUT>


In the above XSL..I get the value of $p undefined 

<xsl:variable name="p" select="key('parentGroups',
generate-id())/@pos" />

So when I access $var_27[$p] and $var_24[$p] ..I get
nothing.

     <PRI_HEADER><xsl:value-of select="$p"/>
          <xsl:value-of select="$var_27[$p]"/>
     </PBU_HEADER>
     <PRIMARY_CUST_DESC>
        <xsl:value-of select="$var_24[$p]"/>
        <xsl:text> </xsl:text>
        <xsl:value-of select="$priId"/>
     </PRIMARY_CUST_DESC>


Can someone please let me know what has gone wrong.




		
___________________________________________________________ 
Win a castle for NYE with your mates and Yahoo! Messenger 
http://uk.messenger.yahoo.com