How to grab found parent node and only its relevant child nodes

I have xsl with help from EE that searches for a country within another node and if found returns the parent and all of its contents
however, the parent contains many sub-zones, i dont want to return the sub-zones that don't contain the country i was initially searching for.
please assist.
input.xml
Output.xml
test1.xsl
badtz7229Asked:
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Geert BormansConnect With a Mentor Information ArchitectCommented:
It all depends on how deep you index.
Is this what you are looking for?
<?xml version = "1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version = "1.0">
    <xsl:output method="xml" indent="yes"/>
    <xsl:strip-space elements="*"/>
    
    <xsl:key name="sub-zone" match="edt[@name = 'zones']/ce/data/zone/sub-zone" use="locations/location/@code"/>
    
    <xsl:template match = "/">
        <xsl:apply-templates select="ROOT/edt[@name='country']"/>
    </xsl:template>
    
    
    <xsl:template match="edt[@name='country']">
        <edt>
            <xsl:attribute name="name">ResultZone</xsl:attribute>
            <xsl:for-each select="ce">
                <ce>
                    <xsl:copy-of select="code"/>
                    <xsl:call-template name="GetZonesTemp">
                        <xsl:with-param name="country" select="code"/>
                    </xsl:call-template>
                </ce>
            </xsl:for-each>
        </edt>
        
    </xsl:template>
    
    
    <xsl:template name="GetZonesTemp">
        <xsl:param name="country"/>
        <desc>
            <xsl:choose>
                <xsl:when test="key('sub-zone', $country)">
                    <zone>
                        <xsl:copy-of select="key('sub-zone', $country)/ancestor::zone[1]/@*"/>
                        <xsl:copy-of select="key('sub-zone', $country)"/>
                    </zone>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="'Not  found'"/>
                </xsl:otherwise>
            </xsl:choose>          
        </desc>
    </xsl:template>
    
</xsl:stylesheet>

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badtz7229Author Commented:
Gertone:
Can you please explain why in the GetZonesTemp template you do a copy-of select 2x?

 <xsl:copy-of select="key('sub-zone', $country)/ancestor::zone[1]/@*"/>
<xsl:copy-of select="key('sub-zone', $country)"/>


the result is correct, but I'd like to understand what this ancestor feature does and why you wouldn't get dups given that you copy-select twice
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badtz7229Author Commented:
Gertone:

i also wanted to ask how would you resolve the issue where the country i was searching for exists in both sub-zones, but i only want the 2nd instance of it?
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Geert BormansInformation ArchitectCommented:
copy-of makes a deep copy of the selected node(set)

<xsl:copy-of select="key('sub-zone', $country)"/> copies the sub-zone which I get back from using the key() function

<xsl:copy-of select="key('sub-zone', $country)/ancestor::zone[1]/@*"/> copies a different node. It selects the same sub-zone to start with, travels to the ancestor (that are the elements higher up the hierrachy) with the name "zone", takes the first one it encounters, and then selects all its attributes

So the first copy-of in the xslt copies the attributes of the parent, the second copy-of copies the entire sub-zone
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Geert BormansConnect With a Mentor Information ArchitectCommented:
<xsl:copy-of select="key('sub-zone', $country)[last()]"/>
would select the last sub-zone, being the first if there is only one, or the second if there are two
would that help?
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badtz7229Author Commented:
Gertone:
yes  your last code snippet definetly worked.
can you please explain how? (i'm a newbie to xsl, so am learning as i go)
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Geert BormansInformation ArchitectCommented:
key('sub-zone', $country) will return all subzones
[] adds a predicate in which you can define some restrictions
last() is short for position() = last()

key('sub-zone', $country)[last()]
will select the last sub-zone from teh selected sub-zones
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