XSL recursion sample

In my use case, I am receiving part numbers as a big string and all are separated by comma(,), I need to split them in to array of elements.
Here is the sample code.

<xsl:template name="printChildObjects">
  <xsl:param name="inputString"/>
  <xsl:param name="delimiter"/>

  <xsl:choose>
    <xsl:when test="contains($inputString, $delimiter)">
    <xsl:variable name="aChild">
    
    <xsl:value-of select="substring-before($inputString,$delimiter)"/>
    </xsl:variable>
    <xsl:element name="field">
    <xsl:attribute name="name">
    <xsl:text> childObject</xsl:text>
     </xsl:attribute> 
     <xsl:value-of select="$aChild" /> 
     </xsl:element>
        <xsl:call-template name="printChildObjects">
           <xsl:with-param name="inputString" select="substring-after($inputString,$delimiter)"/>
           <xsl:with-param name="delimiter"
           
          select="$delimiter"/> 
            </xsl:call-template>
            </xsl:when> 
             <xsl:otherwise> 
             <xsl:choose> 
                <xsl:when test="$inputString != ''"> 
                <xsl:element name="field"> 
                <xsl:attribute name="name"> 
                <xsl:text> childObject</xsl:text> 
                     </xsl:attribute> 
                     <xsl:value-of select="$inputString" />    </xsl:element> 
             </xsl:when> 
             <xsl:otherwise>
         </xsl:otherwise> 
        </xsl:choose> 
      </xsl:otherwise> 
   </xsl:choose>
</xsl:template>