<rules
    xmlns="http://namespaces.plone.org/diazo"
    xmlns:css="http://namespaces.plone.org/diazo/css"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    >
    <xsl:variable name="use_theme1" css:select="body.theme1"/>
    <theme if-content="$use_theme1" href="theme1.html"/>
    <theme if-content="not($use_theme1)" href="theme2.html"/>
    <copy css:theme="#content" css:content="body > *"/>
</rules>
