File: Data.xml
<?xml version="1.0"?>
<book>
<title>XSLT Topics</title>
<chapter>
<title>XPath</title>
<para>text</para>
</chapter>
<chapter>
<title>Stylesheet Basics</title>
<para>text</para>
</chapter>
<chapter>
<title>Branching and Control Elements</title>
<para>text</para>
</chapter>
<chapter>
<title>Functions</title>
<para>text</para>
</chapter>
</book>
File: Transform.xslt
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:import href="standard-style.xsl" />
<xsl:template match="line">
<xsl:number level="any" format="001" />
  
<xsl:apply-imports />
</xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?>
XSLT Topics
XPath
text
Stylesheet Basics
text
Branching and Control Elements
text
Functions
text
|