XML to XML Transformation using simple XSLT - xslt

Question

I am new to XSLT. Please share XSLT for below input and Output XMLs.
Input XML :
<Cars>
<Car>
<Company>Maruthi</Company>
<Model>Alto</Model>
<FeatureName>CC|Mileage</FeatureName>
<FeatureValue>800|20</FeatureValue>
</Car>
<Car>
<Company>Hyundai</Company>
<Model>i10</Model>
<FeatureName>CC|Mileage|Airbag</FeatureName>
<FeatureValue>1000|18|Y</FeatureValue>
</Car>
</Cars>
Output XML :
<Cars>
<Car>
<Company>Maruthi </Company>
<Model>Alto </Model>
<FeatureName><CC>800</CC><Mileage>20</Mileage></FeatureName>
</Car>
<Car>
<Company>Hyundai </Company>
<Model>i10 </Model>
<FeatureName><CC>1000</CC><Mileage>18</Mileage><Airbag>Y</Airbag></FeatureName>
</Car>
</Cars>
Please provide the XSLT to transform input to Output XML.
Thanks in Advance.

Answer 1

This works:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()" />
</xsl:copy>
</xsl:template>
<xsl:template match="Cars/Car/FeatureValue"/>
<xsl:template match="Cars/Car/FeatureName">
<xsl:param name="featureNames" select="concat(./text(),'|')"/>
<xsl:param name="featureValues" select="concat(following-sibling::FeatureValue/text(),'|')"/>
<FeatureName>
<xsl:call-template name="features">
<xsl:with-param name="featureNames" select="$featureNames" />
<xsl:with-param name="featureValues" select="$featureValues" />
</xsl:call-template>
</FeatureName>
</xsl:template>
<xsl:template name="features">
<xsl:param name="featureNames"/>
<xsl:param name="featureValues"/>
<xsl:param name="featureName" select="substring-before($featureNames,'|')"/>
<xsl:param name="featureValue" select="substring-before($featureValues,'|')"/>
<xsl:choose>
<xsl:when test="$featureName">
<xsl:element name="{$featureName}"><xsl:value-of select="$featureValue" /></xsl:element>
<xsl:call-template name="features">
<xsl:with-param name="featureNames" select="substring-after($featureNames,'|')" />
<xsl:with-param name="featureValues" select="substring-after($featureValues,'|')" />
</xsl:call-template>
</xsl:when>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>