SortBy invoice approvalID for XSLT mapping

XSLT mapping:

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="2.0" xmlns:xsl=http://www.w3.org/1999/XSL/Transform>

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

<xsl:output method="xml" indent="yes"/>

<xsl:template match="root/invoice-header">

<xsl:copy>

<xsl:apply-templates select="node() except (approvals)"/>

<approvals>

<xsl:apply-templates select="approvals/approval">

<xsl:sort select="id" order= "descending"/>

</xsl:apply-templates>

</approvals>

</xsl:copy>

</xsl:template>

<xsl:template match="@* | node()">

<xsl:copy>

<xsl:apply-templates select="@* | node()"/>

</xsl:copy>

</xsl:template>

</xsl:stylesheet>