<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" encoding="UTF-8" />
    <xsl:strip-space elements="*" />
    <xsl:template match="*">
        <xsl:copy>
            <xsl:apply-templates />
        </xsl:copy>
    </xsl:template>
    
    <xsl:template match="address">
        <address>
            <xsl:copy-of select="../street" />
            <xsl:copy-of select="../building" />
        </address>
    </xsl:template>
    
    <xsl:template match="street|building"></xsl:template>
</xsl:stylesheet>