XSL transform that empties an xml file of all its content, retains structure

empty_xml.xsl

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >

    <xsl:template match="*">
        <xsl:copy>
            <xsl:apply-templates select="@*"/>
            <xsl:apply-templates select="*" />
        </xsl:copy>
    </xsl:template>

    <xsl:template match="@*">
        <xsl:attribute name="{name()}" />
    </xsl:template>

</xsl:stylesheet>