Simple xsl

sample.xsl

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:param name="myparam">Not set</xsl:param>
<xsl:template match="/root"> 
<h1>
<xsl:value-of select="content"/>
</h1>
<param><xsl:value-of select="$myparam"/></param>
</xsl:template>

</xsl:stylesheet>