Support in book/part remains to be added.
<!-- ==================================================================== -->
-<xsl:template match="ackno">
+<xsl:template match="ackno|acknowledgements[parent::article]">
<fo:block xsl:use-attribute-sets="normal.para.spacing">
<xsl:call-template name="anchor"/>
<xsl:apply-templates/>
<!-- ==================================================================== -->
-<xsl:template match="ackno">
+<xsl:template match="ackno|acknowledgements[parent::article]">
<p>
<xsl:apply-templates select="." mode="class.attribute"/>
<xsl:apply-templates/>