Count of elements in a document as desribed in http://www.dpawson.co.uk/xsl/sect2/N2018.html#d3308e250

countElements.xslt

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:key name="gis" match="*" use="name()"/>
    <xsl:template match="/">
     <table>        
        <xsl:apply-templates/>
        <xsl:message>done reading</xsl:message>
        <xsl:for-each select="//*[generate-id(.)=generate-id(key('gis',name(.))[1])]">            
            <xsl:sort select="name()"/>            
            <tr>
                <td><xsl:value-of select="name(.)"/></td>                    
                <td><xsl:value-of select="count(key('gis',name(.)))"/></td>
            </tr>
        </xsl:for-each>
       </table> 
    </xsl:template>
    <xsl:template match="text()"/>
</xsl:stylesheet>