From: Peter Hickman <peter@...>
Date: 2007-07-11T18:06:59+09:00
Subject: Re: Creating a language -- HTML + a few special tags

This is classic XSLT. For example given this data file:

foobar.xml
=======

<ul>
  <li><FOO>something</FOO></li>
  <li><BAR>something else</BAR></li>
</ul>

And this xslt...

foobar.xsl
=======

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
version="1.0">
  <xsl:output
    method="xml"
    version="1.0"
    encoding="utf8"
    indent="yes"/>

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

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

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

  <!-- Otherwise just copy the element -->
  <xsl:template match="*">
    <xsl:element name="{name()}">
      <xsl:for-each select="@*">
        <xsl:attribute name="{name()}">
          <xsl:value-of select="."/>
        </xsl:attribute>
      </xsl:for-each>
      <xsl:apply-templates/>
    </xsl:element>
  </xsl:template>
</xsl:stylesheet>

and we run it like this

peter@radish:~$ xsltproc foobar.xsl foobar.xml
<?xml version="1.0" encoding="utf8"?>
<ul>
  <li><p><strong>something</strong></p></li>
  <li><blink><em>something else</em></blink></li>
</ul>

You can see how to add all the new elements you want.

For this problem the correct tool is XSLT.