Problem with keys in for-each (?)

In the following XSLT, I have a key() function called to look up a specific
element in the key.  If I call this alone, as it is in the first line of the
template for "/", it works and I get the output I expect.  If I do the EXACT
same thing within the loop, I get no output as a result of the
apply-templates. The for-each loop is getting executed the appropriate
number of times.  The results are the same for MSXML3 and Saxon.  Any ideas?


<?xml version="1.0"?> 
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0" 
                xmlns:xbrl="http://www.xbrl.org/core/2000-07-31/metamodel" 
                xmlns:xsd ="http://www.w3.org/1999/XMLSchema">

<xsl:variable name="taxonomy" select="document('AlteredTaxonomy.xml')" />

<xsl:key name="itemKey" match="//*[local-name() = 'item']" 
			use="ancestor-or-self::*[@type][1]/@type" />

<xsl:template match="/"> 
  <!-- this apply-templates call works fine and calls the template below
correctly -->
  <xsl:apply-templates select="key('itemKey',
'ci:entityInformation.businessDescription')" />

  <xsl:for-each select="$taxonomy//element" >
    <!-- xsl:number does output something the number of times I would
expect, 
		so I know this loop is getting executed -->
    <xsl:number /><BR/>

    <!-- nothing is generated by this call this time - 	
		it's exactly the same as the above apply-templates call...
Why? -->
    <xsl:apply-templates select="key('itemKey',
'ci:entityInformation.businessDescription')" />   

  </xsl:for-each> 

</xsl:template>

<xsl:template match="*">
  do something here
</xsl:template>

I want to create a variable within the for-each loop with the correct key
and
look that up - but since I can't get past this issue, I can't use the
variable as the key either,
which is why this bizarre hardcoded XSLT is what I currently am working
with. 

Thanks. 

Don





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