<xsl:function name="f:is-heading" as="xs:boolean">
<xsl:param name="e" as="element()"/>
<xsl:sequence select="matches(local-name($e), 'h[1-9]')"/>
</xsl:function>

<xsl:template match="body/*">
<xsl:copy-of select="."/>
</xsl:template>

<xsl:template match="body/*/is-heading(.)" priority="10">
<div>
<xsl:copy-of select=".|following-sibling::*[1]"/>
</div>
</xsl:template>

My goal is to prevent *orphans* title, that's why I need to group each title with his first-sibling (with conditions as said before).

Michael Kay
Saxonica