Using Key/Template to Lookup External Source on XSLT

The following xml document is being looked up by an XSLT:

<?xml version="1.0"?>
<Generic>
    <SalesOrgProperties_HashMap>
        <item key="1003" value="3660,00,C0"/>
        <item key="1005" value="3670,00,L0"/>
        <item key="1214" value="4200,00,L0"/>
    </SalesOrgProperties_HashMap>
    <CondType_PriceListDiscount_HashMap>
        <item key="1003" value="ZL99"/>
        <item key="1005" value="ZL99"/>
        <item key="1214" value="ZL99"/>
        <item key="1227" value="ZL99"/>
    </CondType_PriceListDiscount_HashMap>
    <CondType_NetAmount_HashMap>
        <item key="1003" value="ZAF2"/>
        <item key="1005" value="ZAF2"/>
        <item key="1214" value="ZPVP"/>
        <item key="1227" value="ZAF2"/>
    </CondType_NetAmount_HashMap>
    <CondType_GrossPrice_HashMap>
        <!--<item key="1003" value="ZHTI"/>-->
        <item key="1005" value="ZHTI"/>
        <item key="1214" value="ZHTI"/>
        <item key="1227" value="ZHTI"/>
    </CondType_GrossPrice_HashMap>
</Generic>

The blocks that employs the lookup operation are these:

    <xsl:key name="SO_ReplaceFunction" match="item" use="@key"/>
    <xsl:variable name="SO_Properties" select="document($LookupDocument)/Generic/SalesOrgProperties_HashMap"/>
    <xsl:key name="CondType_PriceListDiscount_ReplaceFunction" match="item" use="@key"/>
    <xsl:variable name="CondType_PriceListDiscount_Properties" select="document($LookupDocument)/Generic/CondType_PriceListDiscount_HashMap"/>
    <xsl:key name="CondType_NetAmount_ReplaceFunction" match="item" use="@key"/>
    <xsl:variable name="CondType_NetAmount_Properties" select="document($LookupDocument)/Generic/CondType_NetAmount_HashMap"/>
    <xsl:key name="CondType_GrossPrice_ReplaceFunction" match="item" use="@key"/>
    <xsl:variable name="CondType_GrossPrice_Properties" select="document($LookupDocument)/Generic/CondType_GrossPrice_HashMap"/>

And the defined templates:

    <xsl:template match="SalesOrgProperties_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('SO_ReplaceFunction', $valueToLookup)/@value"/>
    </xsl:template>
    <xsl:template match="CondType_PriceListDiscount_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('CondType_PriceListDiscount_ReplaceFunction', $valueToLookup)/@value"/>
    </xsl:template>
    <xsl:template match="CondType_NetAmount_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('CondType_NetAmount_ReplaceFunction', $valueToLookup)/@value"/>
    </xsl:template>
    <xsl:template match="CondType_GrossPrice_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('CondType_GrossPrice_ReplaceFunction', $valueToLookup)/@value"/>
    </xsl:template>

And an example application:

    <xsl:apply-templates select="$CondType_PriceListDiscount_Properties">
        <xsl:with-param name="valueToLookup" select="$salesOrg"/>
    </xsl:apply-templates>

The output seen is:

However, I was expecting this: ZL99 for an input of 1214.

Any idea what am I wrong? Thanks.

You could also change

    <xsl:template match="CondType_PriceListDiscount_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('CondType_PriceListDiscount_ReplaceFunction', $valueToLookup)/@value"/>
    </xsl:template>

to

    <xsl:template match="CondType_PriceListDiscount_HashMap">
        <xsl:param name="valueToLookup"/>
        <xsl:value-of select="key('CondType_PriceListDiscount_ReplaceFunction', $valueToLookup, .)/@value"/>
    </xsl:template>

if I understand your document structure and templates correctly.

It might be possible that way to use a single key and a single template

<xsl:template match="SalesOrgProperties_HashMap | CondType_PriceListDiscount_HashMap | CondType_NetAmount_HashMap | CondType_GrossPrice_HashMap">
  <xsl:param name="valueToLookup"/>
  <xsl:value-of select="key('CondType_PriceListDiscount_ReplaceFunction', $valueToLookup, .)/@value"/>
</xsl:template>