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Example XSLT -transform to XHTML

from http://www.w3.org

This example is a stylesheet for transforming documents that conform to a simple DTD into XHTML. The DTD is:

<!ELEMENT doc (title, chapter*)>
<!ELEMENT chapter (title, (para|note)*, section*)>
<!ELEMENT section (title, (para|note)*)>
<!ELEMENT title (#PCDATA|emph)*>
<!ELEMENT para (#PCDATA|emph)*>
<!ELEMENT note (#PCDATA|emph)*>
<!ELEMENT emph (#PCDATA|emph)*>

The stylesheet is:

<xsl:stylesheet version="1.0"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns="http://www.w3.org/TR/xhtml1/strict">

<xsl:strip-space elements="doc chapter section"/>
<xsl:output
   method="xml"
   indent="yes"
   encoding="iso-8859-1"
/>

<xsl:template match="doc">
 <html>
   <head>
     <title>
       <xsl:value-of select="title"/>
     </title>
   </head>
   <body>
     <xsl:apply-templates/>
   </body>
 </html>
</xsl:template>

<xsl:template match="doc/title">
  <h1>
    <xsl:apply-templates/>
  </h1>
</xsl:template>

<xsl:template match="chapter/title">
  <h2>
    <xsl:apply-templates/>
  </h2>
</xsl:template>

<xsl:template match="section/title">
  <h3>
    <xsl:apply-templates/>
  </h3>
</xsl:template>

<xsl:template match="para">
  <p>
    <xsl:apply-templates/>
  </p>
</xsl:template>

<xsl:template match="note">
  <p class="note">
    <b>NOTE: </b>
    <xsl:apply-templates/>
  </p>
</xsl:template>

<xsl:template match="emph">
  <em>
    <xsl:apply-templates/>
  </em>
</xsl:template>

</xsl:stylesheet>

With the following input document

<!DOCTYPE doc SYSTEM "doc.dtd">
<doc>
<title>Document Title</title>
<chapter>
<title>Chapter Title</title>
<section>
<title>Section Title</title>
<para>This is a test.</para>
<note>This is a note.</note>
</section>
<section>
<title>Another Section Title</title>
<para>This is <emph>another</emph> test.</para>
<note>This is another note.</note>
</section>
</chapter>
</doc>

it would produce the following result

<?xml version="1.0" encoding="iso-8859-1"?>
<html xmlns="http://www.w3.org/TR/xhtml1/strict">
<head>
<title>Document Title</title>
</head>
<body>
<h1>Document Title</h1>
<h2>Chapter Title</h2>
<h3>Section Title</h3>
<p>This is a test.</p>
<p class="note">
<b>NOTE: </b>This is a note.</p>
<h3>Another Section Title</h3>
<p>This is <em>another</em> test.</p>
<p class="note">
<b>NOTE: </b>This is another note.</p>
</body>
</html>