<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.idpf.org/2007/opf" version="2.0" xpath-default-namespace="http://www.idpf.org/2007/opf" exclude-result-prefixes="#all"> <xsl:import href="opf2-to-opf3-metadata.xsl"/> <xsl:param name="compatibility-mode" required="yes"/> <xsl:template match="package/@version"> <xsl:attribute name="version" select="'3.0'"/> </xsl:template> <xsl:template match="guide"> <xsl:if test="$compatibility-mode='true'"> <xsl:next-match/> </xsl:if> </xsl:template> <xsl:template match="tours"/> <xsl:template match="item/@required-namespace| item/@fallback-style"/> </xsl:stylesheet>