Very Old: XSLT, XSL code convert XML file to produce SOLR documents ( aka xml)

Based on content needs, I used different strategies to produce SOLR input documents.
One of old post, contains Excel input to SOLR input documents.
In this particular use-case, a simple  XSL aka XSLT, style-sheet converts an incoming eCommerce XML content feed in to SOLR documents & pushes these documents to SOLR staging  folder.
From there, our custom SOLR component consumes these xml to add or update new content at regular intervals. I will post that custom SOLR component logic later in this blog. For now,  I am including sample stylesheet which produces solr input XML document based another XML input feed

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

  <xsl:strip-space elements="*"/>
  <xsl:output method="xml" />

  <xsl:template match="/products">
     <add>
         <xsl:apply-templates />
     </add>
  </xsl:template>


 <xsl:template match="product">
     <doc>
       <xsl:element name="field">
            <xsl:attribute name="name">id</xsl:attribute>
            <xsl:value-of select="./@skuNo"/>
        </xsl:element>

       <xsl:element name="field">
            <xsl:attribute name="name">status</xsl:attribute>
            <xsl:value-of select="./@status"/>
        </xsl:element>
       <xsl:element name="field">
            <xsl:attribute name="name">brand</xsl:attribute>
            <xsl:value-of select="./brand"/>
        </xsl:element>
       <xsl:element name="field">
            <xsl:attribute name="name">description</xsl:attribute>
            <xsl:value-of select="./descriptions/description"/>
        </xsl:element>
       <xsl:element name="field">
            <xsl:attribute name="name">department</xsl:attribute>
            <xsl:value-of select="./department/@name"/>
        </xsl:element>

       <!-- one can debate later… this is for now -->:q!



       <xsl:element name="field">
            <xsl:attribute name="name">categoryname</xsl:attribute>
            <xsl:value-of select="./class/@name"/>
        </xsl:element>


        <xsl:call-template name="addCurrentPrice">
        <xsl:with-param name="price" select="."/>
</xsl:call-template>

        <xsl:call-template name="addTaxonomyContent">
        <xsl:with-param name="skid" select="."/>
</xsl:call-template>

    </doc>
 </xsl:template>

<xsl:template name="addCurrentPrice">
    <xsl:param name="product"/>

      <xsl:for-each select="./offers/offer/prices/*">
          <xsl:element name="field">
               <xsl:attribute name="name"><xsl:value-of select="@type"/></xsl:attribute>
               <xsl:value-of select="@amount"/>
        </xsl:element>
      </xsl:for-each>
</xsl:template>

<xsl:template name="addTaxonomyContent">
    <xsl:param name="product"/>
      <xsl:for-each select="./hierarchy/*">
           <xsl:variable name="ctr" select="position()"/>
           <xsl:variable name="variable" select="concat('tname_',$ctr)"/>

          <xsl:element name="field">
               <xsl:attribute name="name"><xsl:value-of select="$variable"/></xsl:attribute>
               <xsl:value-of select="@name"/>
        </xsl:element>
      </xsl:for-each>
</xsl:template>


</xsl:stylesheet>