Write Path: a utility that I use for XSLT debugging, which will show the present XPath location in an XML document.

writepath.xsl

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:template name="write-path">
        <xsl:param name="path"/>
        <xsl:param name="output"/>

        <xsl:choose>
            <xsl:when test="$path/parent::node()">
                <xsl:call-template name="write-path">
                    <xsl:with-param name="output">
                        <xsl:choose>
                            <xsl:when test="$output">
                                <xsl:value-of select="concat(local-name($path), '/', $output)"/>
                            </xsl:when>
                            <xsl:otherwise>
                                <xsl:value-of select="local-name($path)"/>
                            </xsl:otherwise>
                        </xsl:choose>
                    </xsl:with-param>
                    <xsl:with-param name="path" select="$path/parent::node()"/>
                </xsl:call-template>
            </xsl:when>
            <xsl:otherwise>
                <xsl:value-of select="concat('/',$output)"/>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>
</xsl:stylesheet>