Saxon

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet

version="3.0"

xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

xmlns:xs="http://www.w3.org/2001/XMLSchema"

exclude-result-prefixes="xs">

<xsl:template name="main">

<xsl:variable name="output" as="element()+">

<h3>Test</h3>

<p>Some <b>bold</b> and <i>italic</i> text. 'Single quoted text' and "double quoted text".</p>

</xsl:variable>

<xsl:variable name="serialization-parameters" as="element()">

<output:serialization-parameters

xmlns:output="http://www.w3.org/2010/xslt-xquery-serialization">

<output:method value="html"/>

<output:indent value="yes"/>

<output:use-character-maps>

<output:character-map character="&#34;" map-string="&quot;"/>

<output:character-map character="'" map-string="&#39;"/>

</output:use-character-maps>

</output:serialization-parameters>

</xsl:variable>

<meta name="citation_abstract" content="{serialize($output,$serialization-parameters)}"/>

</xsl:template>

</xsl:stylesheet>