Input:-
<body>
<p class="title">Article Title</p>
<p class="Authors">abc, pqr and xyz</p>
<p class="intro">here is introdution text......</p>
<p class="head1">1: Heading level 1</p>
<p>some text here</p>
<p>some text here</p>
<p class="head2">1.1: Heading level 2</p>
<p>some text here</p>
<p>some text here</p>
<p class="head3">1.1.1: Heading level 3</p>
<p>some text here</p>
<p>some text here</p>
<p class="head1">2: Heading level 1</p>
<p class="head2">2.1: Heading level 2</p>
<p>some text here</p>
<p>some text here</p>
<p class="head3">2.1.1: Heading level 3</p>
<p>some text here</p>
<p>some text here</p>
<p class="head3">2.1.2: Heading level 3</p>
<p>some text here</p>
<p>some text here</p>
</body>Expected Output:
<?xml version="1.0" encoding="UTF-8"?>
<body>
<section name="head1">
<title>1: Heading level 1</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
<section name="head2">
<title>1.1: Heading level 2</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
<section name="head3">
<title>1.1.1: Heading level 3</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
</section>
</section>
</section>
<section name="head1">
<title>2: Heading level 1</title>
<section name="head2">
<title>2.1: Heading level 2</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
<section name="head3">
<title>2.1.1: Heading level 3</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
</section>
<section name="head3">
<title>2.1.2: Heading level 3</title>
<paras>
<p>some text here</p>
<p>some text here</p>
</paras>
</section>
</section>
</section>
</body>
XSLT
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:vish="http://www.marklogicgd.blogspot.in/vish"
exclude-result-prefixes="xs vish" version="2.0">
<xsl:output indent="yes"/>
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<xsl:function name="vish:group" as="element(section)*">
<xsl:param name="entries" as="element(p)*"/>
<xsl:param name="level" as="xs:integer"/>
<xsl:for-each-group select="$entries"
group-starting-with="p[@class = concat('head',$level)]">
<xsl:variable name="P_ID" select="generate-id(.)"/>
<section name="{@class}">
<title>
<xsl:value-of select="."/>
</title>
<xsl:if test="following-sibling::p[1][not(@class)]">
<paras>
<xsl:apply-templates
select="following-sibling::p[not(@class)][generate-id(preceding-sibling::p[@class][1]) = $P_ID]"
/>
</paras>
</xsl:if>
<xsl:sequence select="vish:group(current-group() except ., ($level + 1))"/>
</section>
</xsl:for-each-group>
</xsl:function>
<xsl:template match="body">
<xsl:copy>
<xsl:sequence select="vish:group(p[contains(@class,'head')], 1)"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
