XML/XSLT stylesheet/following

preceding and following

File: Data.xml
<story>
  <chapter>
    <title>Chapter 1</title>
    <para>para 1</para>
  </chapter>
  <chapter>
    <title>Chapter 2</title>
    <para>item 1</para>
    <test />
    <para>item 2</para>
    <sect>
      <title>Chapter 2, Section 1</title>
      <para>item 3</para>
      <test />
      <para>para 2</para>
    </sect>
  </chapter>
  <chapter>
    <title>Chapter 3</title>
    <para>para A</para>
  </chapter>
</story>

File: Transform.xslt
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0">
  <xsl:output method="xml" omit-xml-declaration="yes" indent="no" />
  <xsl:template match="test">
    Previous chapter: (
    <xsl:value-of select="preceding::chapter[1]/title" />
    ) Next chapter: (
    <xsl:value-of select="following::chapter/title" />
    )
    <xsl:apply-templates />
  </xsl:template>
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()" />
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>
Output:
<story>
  <chapter>
    <title>Chapter 1</title>
    <para>para 1</para>
  </chapter>
  <chapter>
    <title>Chapter 2</title>
    <para>item 1</para>
    
    Previous chapter: (
    Chapter 1
    ) Next chapter: (
    Chapter 3
    )
    
    <para>item 2</para>
    <sect>
      <title>Chapter 2, Section 1</title>
      <para>item 3</para>
      
    Previous chapter: (
    Chapter 1
    ) Next chapter: (
    Chapter 3
    )
    
      <para>para 2</para>
    </sect>
  </chapter>
  <chapter>
    <title>Chapter 3</title>
    <para>para A</para>
  </chapter>
</story>