<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:pf="http://www.daisy.org/ns/pipeline/functions" xmlns:opf="http://www.idpf.org/2007/opf" xmlns="http://www.idpf.org/2007/opf" version="2.0" exclude-result-prefixes="#all"> <xsl:include href="http://www.daisy.org/pipeline/modules/smil-utils/clock-functions.xsl"/> <xsl:template match="/*"> <meta property="media:duration"> <xsl:value-of select="pf:smil-seconds-to-full-clock-value(round-half-to-even(sum(//opf:meta/pf:smil-clock-value-to-seconds(.)), 4))"/> </meta> </xsl:template> </xsl:stylesheet>