[xsl] problem building a lookup table and find match from a different template

["Leslie Young" <xlr8sx@xxxxxxxxxxx>]

Hi,
I am trying to create a table lookup using a set of data (dataset2), then 
process a different set of data (dataset1). While going through each item in 
the dataset1, if a value is found for the item in dataset2, use dataset2's 
value. If not, display dataset1's value in a html page.  I have a couple of 
problems, not sure what to do with it.

1) All the data stored in the table display on the html page as a long 
string.  The data is supposed to be used for lookup. I do not know why it 
shows up in the html page.

2) I have a statement to do a quick lookup, but it does not seem find the 
match in the lookup table.  How to do the lookup in a different template 
than the template where the lookup table is built?  If I move the statement 
to where the lookup table is built, it can find the value.

Any suggestion is greatly appreciated.
Thanks!

Here is my xml: (simplied version)

<dataset1 someData>
 <Root>
   <Item ID="A" Value="001"></Item>
   <Item ID="B" Value="002"></Item>
   <Item ID="C" Value="003"></Item>
   <Item ID="D" Value="004"></Item>
 </Root>
</dataset2>

<dataset2 someData>
 <Root someData
   <Item ID="B" Value="222"></Item>
   <Item ID="D" Value="444"></Item>
 </Root>
</dataset2>


Desired output:
A 001
B 222
C 003
D 444



Xsl:
<xsl:stylesheet version="1.0"
               xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
               xmlns:xalan="http://xml.apache.org/xalan";
               xmlns:fo="http://www.w3.org/1999/XSL/Format";
                xmlns:s="http://recs.data";
               >

<xsl:key name="rec-lookup" match="s:rec" use="s:keyid"/>
<xsl:variable name="recs-top" select="document('')/*/s:recs"/>


<xsl:template name="main-html">

 <!-- use dataset2 to build table    -->
    <xsl:choose>
     <xsl:when test="dataset2/Root">
       <xsl:call-template name="build-rec-lookup-table">
         <xsl:with-param name="dataset" select="dataset2/Root"/>
       </xsl:call-template>
     </xsl:when>
   </xsl:choose>

 <!-- process dataset 1 -->
 <div align="center" class="whitebg">
   <!-- process raw data -->
   <xsl:choose>
     <xsl:when test="dataset1/Root">
       <xsl:call-template name="generate-html">
         <xsl:with-param name="dataset" select="dataset1/Root"/>
       </xsl:call-template>
     </xsl:when>
   </xsl:choose>

 </div>

</xsl:template>


<xsl:template name="build-rec-lookup-table">
 <xsl:param name="dataset"/>

 <s:recs>
 <xsl:for-each select="$dataset/Item">
         <s:rec>
         <s:keyid><xsl:value-of select="@ID" /></s:keyid>
         <s:value><xsl:value-of select="@Value" /></s:value>
         </s:rec>
 </xsl:for-each>
 </s:recs>

</xsl:template>


<xsl:template name="generate-html">

 <!-- incomplete coding, only a brief testing to look up the table -->
 <td>
    A<xsl:value-of select="key('rec-lookup','A')" />
 </td>

</xsl:template>

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