Re: Question about variable-field lookup tables

I need some help with a particular problem I'm trying to solve. I need to
transform an xml document that is based partially on information that is
extracted from another xml file whose purpose is to act like a lookup
table.

T:\ftemp>type ali-lookup.xml
<AB>
   <TC name="a">
     <TTM type="b">
        <UCM preference="1">
           <UC>S</UC>
           <UPS>
              <pa prefnum="1">
                 <XXXX>
                   <YYYY/>
                   <ZZZZ/>
                 </XXXX>
              </pa>
              <pa prefnum="2">
                 <WWWW/>
              </pa>
           </UPS>
        </UCM>
     </TTM>
   </TC>
   ...
</AB>

T:\ftemp>type ali.xml
<TM>
    <T id="something" TC="a">
        <Type>b</Type>
        <Prefs>
            <UC>S</UC>
            <UPS>1</UPS>
        </Prefs>
    </T>
    <T id="something" TC="a">
        <Type>b</Type>
        <Prefs>
            <UC>S</UC>
            <UPS>2</UPS>
        </Prefs>
    </T>
    ...
</TM>

T:\ftemp>type ali.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">

<xsl:template match="T">
  <xsl:variable name="tc" select="@TC"/>
  <xsl:variable name="ttm" select="Type"/>
  <xsl:variable name="uc" select="Prefs/UC"/>
  <xsl:variable name="ups" select="Prefs/UPS"/>
  <xsl:for-each select="document('ali-lookup.xml')">
    <xsl:apply-templates mode="modify"
                         select="/AB/TC[@name=$tc]/TTM[@type=$ttm]/
                                 UCM[UC=$uc]/UPS/pa[@prefnum=$ups]/*"/>
  </xsl:for-each>
</xsl:template>

<xsl:template match="@*|node()">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
</xsl:template>

<xsl:template match="*" mode="modify" priority="2">
  <p c="{name(.)}">
    <xsl:apply-templates mode="modify"/>
  </p>
</xsl:template>

<xsl:template match="@*|node()" mode="modify">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
</xsl:template>

T:\ftemp>saxon ali.xml ali.xsl
<?xml version="1.0" encoding="utf-8"?>
<TM>

   <p c="WWWW"/>
    ...
</TM>
T:\ftemp>rem

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