Simple RELAX NG to adoc transformation

rng2adoc.xsl

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  exclude-result-prefixes="xs"
  xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
  version="2.0">
  <xsl:output method="xml" indent="no" omit-xml-declaration="yes"/>
  <xsl:variable name="startxml"><xsl:text>
[source, xml]
-------------------------------------------------------------------------------
</xsl:text></xsl:variable>
  <xsl:variable name="endxml"><xsl:text>
-------------------------------------------------------------------------------
</xsl:text></xsl:variable>

  <xsl:template match="node() | @*">
    <xsl:copy>
      <xsl:apply-templates select="node() | @*"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="/">
    <xsl:value-of select="$startxml"/>
   <xsl:apply-templates/>
    <xsl:value-of select="$endxml"/>
  </xsl:template>

  <xsl:template match="a:documentation">
    <xsl:value-of select="$endxml"/>
    <xsl:value-of select="."/>
    <xsl:value-of select="$startxml"/>
  </xsl:template>

</xsl:stylesheet>