    <?xml version="1.0" encoding="ISO-8859-1"?>

    <xsl:stylesheet
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
      version="1.0"
      >
      <xsl:output method="html"/>

      <xsl:template match="/">
        <html><body>
           <xsl:apply-templates/>
        </body></html>
      </xsl:template>

      <xsl:template match="/ARTICLE/TITLE">
        <h1 align="center"> <xsl:apply-templates/> </h1>
      </xsl:template>

      <!-- Top Level Heading -->
      <xsl:template match="/ARTICLE/SECT">
          <h2> <xsl:apply-templates select="text()|B|I|U|DEF|LINK"/> </h2>
          <xsl:apply-templates select="SECT|PARA|LIST|NOTE"/>
      </xsl:template>

      <!-- Second-Level Heading -->
      <xsl:template match="/ARTICLE/SECT/SECT">
          <h3> <xsl:apply-templates select="text()|B|I|U|DEF|LINK"/> </h3>
          <xsl:apply-templates select="SECT|PARA|LIST|NOTE"/>
      </xsl:template>

      <!-- Third-Level Heading -->
      <xsl:template match="/ARTICLE/SECT/SECT/SECT">
         <xsl:message terminate="yes">Error: Sections can only be nested 2 deep.</xsl:message>
      </xsl:template>

      <!-- Paragraph -->
      <xsl:template match="PARA">
          <p><xsl:apply-templates/></p>
      </xsl:template>

    </xsl:stylesheet>